intersting combination of slide show and movie.   Was hard to follow.... but maybe that was just me... and not knowing the laungage.

Bernard..... Bear.....  Kujo.....

hey... it's all semantics

ROFLMA

ahhhhh got it maybe.  Rope ends are attached to a cap that goes on a 1" PVC pipe.  Handle is a 3" long, 1" piece of PVC.   Tie rope thru a hole in the cap and put the handle on it.

the Cap should pull off the PVC. pipe. if needed; a little sanding inside the cap and you can make it come off easier.

Large size hole in the cap to allow the rope to spin in it so it does not tend to wind-up as you jump.

Yeah I agree about the velcrow may not work for this idea.

... clk merc snd ...

A what?? 
 
CLK Mercury Snd???   
Click Merrcrusier SND??


CLK Mercedes Sedan maybe?

Dude.... Rancher......

wise up or you'll be the one who gives bocking the lable of:

       "too dangerous of a sport"

------which would really hurt us.------

.... and you'll be ranching around in a 4wd wheelchair cause your spinal cord aint connected no more.

stilts in Israel.  Being politcally incorrect and all I'll say...

Guess that is one way to try to dodge bullets and missiles from the boarder firing 

Stay safe over there. 

PS- movie link does not work on that page for me either

...bounce team are working on some really insane stuff on stilts that scares the crap out of me. ..

TAKE YOUR TIME.   While you may be getting the physical pieces and parts for skills...... if you feel insainly scared even though you can complete a skill.... that is a sign your kinestheic awarness (your air sense) is lagging behind a little on  your physical ability.  Means your doing things outside your circle of understanding where you are in the air. 

This builds fears... the fear of not knowing where you are in the air.  Logical reason to be scared when you have no clue where you are above the ground your about to land on (be it on feet or in crash position)

Take your time and let the air sense catch up.  Your overall skill level will reach higher levels. 

If you keep pushing along not letting the kinestheic awarness catch up... the fears will start creeping into your easier skills and it really can FUBAR your progress.    If you get to that point you have to sorta start all over and work your way back up again to reacclamate and further enhance your kinestheics.

Make a Break away rope.  Either in the center or at a handle have it loosely velcrowed?? so if it hits a hoof it just comes apart instead of tripping you?

Course loose grip on your own may be all yuo need.

only seen three guys ever complete this on a trampoline.   So you might only get 1/2 way thru on Bocks? 

Do this all while in the air after a bounce.  Only one shot to get all you can in while your in the air.

Clap your hands together in each of the following places WHILE IN THE AIR:
in front of you.
Under one leg
Front again
Under other leg
Front again
Behind you (waist level behind back)
Over head.

short version to help you think it faster as you practice.
Front, under, front, under, front, back, up

Wonder if the German company is then indirectly admiting their stilts are made in the same skyrunner factory.

nice.... some serious height in your bocking.  I know well the height of the trampolines in the background and your hoofs are above them. 

... The following photo shows some sort of a strap, but that would be the same location, below the knee at the top of the shin, where you would want the knee bar placed against....

That strap is a support for the tibial tuberosity that gets inflamed from jumpers knee and/or Osgood-Schlatters Disease

Health wise in my Educated Humble Opinioun have the knee bar somewhere below the tibal tuberosity (TT).  Try to find that magic spot  between TT and as low as you can before starting to loose stablity.  No lower than half the  the distance from TT and the ankle bone.  BUTTTTTT... there are trade offs. More detail below.

Best spot for helping avoiding knee joint injury and/or broken shin bone seems to me to have the pressure of the knee bar being applied at the spot that is 1/2 the distance from TT to "center" of shin bone. (or 1/4 distance from TT and ankle, same thing just said differently)

Now this 1/4 spot may NOT be best place for getting bocks tight and feeling like they aid in your jump due to maximized stablility .  So from there you have trade off's between mechanical efficency and injury prevention that you have to choose from.  More stability in stilts when strapped on up highertoward TT and above that buttt... Higher up you go toward the TT, higher chance of injury of knee due to hyperextension.  Lower you go from the 1/4 spot  toward the center of the shin bone... the higher chance of breaking your leg (same stress just applied to a different place resulting in different injury by same type accident/wear and tear)

In reality though  lower than that 1/4 spot toward the 1/2 way spot  (from TT to ankle) I see as creating less stability of the stilt on your leg. So doubt you would go that route anyway.

...What is the proper location of the Knee brace ...

We've had a very technical discussion on this in here.  The term often used in here is "knee bar"  so.....  to find this discussion try searching the fourm using a variety of the below key words.

"knee bar"
tendon
Patella
tuberosity

Double up springs.

If it is in your budget you might try your thought of back to back leaf springs is not a bad idea.  For design ideas, check out the concepts used in vehicle leaf springs with big wheel travel such as Rockcrawling rigs, desert race trucks etc.

Also look at some truck leaf spring "Helper spring" designs.  Their intent may be closer to this sitation of  Increased weight.