íve looked all over the forums and I havenít came across a solid answer. I have a 2015 seadoo 3up with IBR. I bought it last week and I want to add the VTS system on my spark. Ive read that some people put the Extended VTS system even tho is pre17 (year 2017 or older). The Seadoo website says it only for 17+ but it apparently works on pre 17. Should I get the extended VTS instead of he regular VTS. Itís cheaper and might make a bigger difference. Anyone have experience or done this to there spark? Does it make any difference?