I have the Qad LD/HD on my 101st and haven't had any issue's and not experienced any change in timing ,but I have "heard" where if the Qad isn't attached to the down cable correctly, it will effect your let off . Your launcher arm shouldn't come to the top till the last 1" of draw if it flip's up when you first begin your draw ,your letoff and I'm sure your timing will all be effected.

nubo