Sanwa goes through Serpent RC now.

Orion goes through Horizon for warranty I know that for sure because I had a battery issue and that is where I had to go. Horizon is a pain to deal with if you have a issue you call in wait 45 to a hour on hold give them your information and then a few weeks later will get a email saying they are looking into and then maybe you get a response later on. I try to avoid Horizon as much as possible.