Sledgehog
RCTalk Champion
Mylaps kind of has the monopoly when it comes to timing systems and transponders. Unfortunately they never go on sale either. You don't need the "pro" transponder ones, just a regular "rc4." They run about $90 no matter where you buy them unless a site like eBay is doing a coupon code for the entire site or a site like amain or horizon that has monthly email coupons like $7.50 off $75 or more.
https://www.amainhobbies.com/mylaps-rc4-3wire-direct-powered-personal-transponder-ait10r120/p260528
Also I think you're overthinking and worrying about this antenna thing too much. Most of them don't even stick out of the car anymore or if they do, they hardly get in the way of anything. It's not like the old 27mhz ones where they stuck out a foot or so from your car. ?
Also Demon mentioned tires, and that's something you def want to find out what people at your specific track are running before buying.
https://www.amainhobbies.com/mylaps-rc4-3wire-direct-powered-personal-transponder-ait10r120/p260528
Also I think you're overthinking and worrying about this antenna thing too much. Most of them don't even stick out of the car anymore or if they do, they hardly get in the way of anything. It's not like the old 27mhz ones where they stuck out a foot or so from your car. ?
Also Demon mentioned tires, and that's something you def want to find out what people at your specific track are running before buying.