hey Paul I see you are from CT. I occasionaly race down there in Enfield at RC madness.
Cris is a super guy and can help you a ton they have the IRS stuff in stock thats where I got the ones I have.
If you do decide to try the cusions on the stock CVD's you may also want to trim them for clearance from the chassis braces alomg with putting a dab of ca on the cusion when you put it on the CVD and do it the way they tell you put the cusion first and then press in the pin. This is how I installed the cusions and they are solid and wont budge.
Jim