I would appreciate feedback and opinions on this please... How big of a difference would it make on the oppenings if I put an RDS built for a VX96 on my JVX90. The JVX slider is a bit bigger so my first guess is faster oppenings but i'm curious to see what people think about that. Would it be a totaly stupid idea ? Thanks !
Short reply: dont do it Longer reply: Dont do it or you WILL get slammed. Long reply: Seriously, dont do it. JVX NEEDS those ears to prevent the air from rushing into the canopy on opening. If you dont have them - it will slam you. Bad. Awhile back, when i just switched from VX96 to JVX87, I modified my VX RDS and put ears on it, just like the aftermarket JVX RDS. I only did 4 jumps with it... Right out the door was more or less OK, but at 4-5 second delays the openings with that slightly smaller VX slider EVEN modified like that were pretty bad... I didnt even dare take it to full speed.
Hope that helps
(This post was edited by frost on Jun 20, 2008, 6:56 AM)
It comes down to what you want in an opening. For me I've used the same RDS for atleast a half dozen different canopies and have had no complaints about the opening. I don't think slider size is as rocket science as some make it out to be. I've used Precision aero's RDS on a VX 85 and also the same RDS on a JVX 75. Its the same slider I've used on my Xaos 68 and then the same slider I've used on a canopy as big as a Sabre 135 All with comfortable opening.
Edit: no pun intended in the first sentance
(This post was edited by packing_jarrett on Jun 20, 2008, 7:08 AM)
i've jumped the same slider for a jvx 87, vx 84, velo 90, and velo 84, all with good openings. i've jumped different sized sliders on velo's ranging from 75 - 96 (ie both big and small sliders on a 75), that had some effect on openings from what i noticed but not enough to concern me. i've also jumped different type rings (ie aluminum, stainless thick, and stainless thin) and that had more effect then slider size that i noticed. out of all that the only time i didn't like the openings was when i was jumping aluminum rings with a small slider on a larger canopy, other than that the differences were too small and inconsistant to make up my mind either way. hope that helps.
btw, what i like best are stainless steel rings and a small slider on the 79/84 and a large slider on the 90/96 from PEA engineering.
think you'll find most manufacturers will disagree with that statement.
It would be interesting to test manufactures slider size. I'm not sure about PD or icarus/Daaudalus but I know for a fact the precision only has 2 slider sizes for all the xaos canopies.
And like many others, we've tried different canopies with the same size RDS
As for rocket science/surgery I don't know what kind of R&D takes place. one extreme to the other would be just taking 4 grommets and some material and hoping it works and the other would be like some weird computer system to do calculations (if any)
All with comfortable opening. 
