Ok here is another post to this emerging page.
What I have done is to show my dummy. This is a plastic Immortal dummy with the leg removed this time to allow access to my Thai pad.
The Thai pad had been squashed up against the mid section to allow knee stikes. If enough pressure is applied it will stay there and keep its inverted 'L' shape. *BUT* dont go mad - it will slip and you will smash your knee cap. Using the straps just remove the 'L' shape and the pad is straigthened out. This means there is no nice space to absorb the 'forward' direction I want from the knee strike into the body not an upward strike into the arm.
The knee strike is really from Thai boxing as it can easily flow out of a wing chun stance or Bi Jong WC/JKD stance. It doesnt matter- it all hurts.
The orange pads are really to stop you being blatently bruised but you cant go flat out on these. Your joints would feel it. Even doubled up those orange pads arnt enough to give flat out strikes. You would need a sandbag for that.
The dummy has the pegs removed from the corner of the base to allow yeild when forward force is applied - I chose this to give some feeback when force was going into the dummy - and save my joints from absorbing all the force. It may be worth putting the wedges back everynow and then to see if your stance can take feedback with out crumbling.
The reason why I remove the leg sometimes is to allow more access to the pad and also copy Joseph Simonet's use. Joseph Simonet's videos on the dummy in 'Extreme Wing Chun vols 1 and 2' and his form tapes - 'Slam Set'. These had a big influence on me as they synthesised Silat with Wing Chun and Kali ideas. More on this later .....
The leg removed simplifes things and you can still be forced to veer off in a 'V' shape due to the arms. I put the leg back when I want to really be forced to veer off to the flanks more blatently / practics sweeps or oblique kicks to the 'knee'. Even without the leg on kciks can be done to the square base or body of the dummy - but these have different qualities