To MissX... Mr. Santo has uses KO PDS2123 FET servo with V12XC WITHOUT connecting the fet wire from servo to anything and it still works normal. I've not seen the car, it just based from what he told me recently.
V12XC is a great ESC and yes the limiter is not that perfect but it should be adequate enough to make such adjustment. It is just its appeareance quality (cheap printing stiker) and its body colors that bothers me the most.
As far as for Keyence...they look very solid but does it worth the price?? Looks good if putted on your Xray tough.
VFS2000...isn't that would be too many adjustment you need to do on the track??? For me, I prefer playing more with bunch of guys than struggle with whether or not those are the best adjustment from many many choices. Also, when those wizards broken, what will you do?...bring a laptop along for the race?? Oh if you did, I should expect you to be in 2002 IFMAR then...hehehe
Quantum competition, the one I used, size OK, appearance quality and colors look good, performace???.....I think I need another ESC for spare since I'm afraid it will be fried like what people have saying about it. About its FET, it's only 6V. Does using PDS2123 7.2v FET servo has some draw back when connected???
Looking from what I have said above, I think I'll go with GMV12xc for my spare in case I need it on a race day. Price consider the cheapest among what have been mention I believe, performance already proven, and those casing colors I can live with.