Hey, Losi has that new MT, with a GAS-powered, but nitro-sized engine. So you don't have to buy the ex$pensive nitro fuel. Just pump gas!
Sorry to hear about your experience with the Redcat Caldera. It's my belief that just about every RC has
some weak link that needs to be modified. I had a similar problem with ball studs pulling out of the steering knuckles. A longer ball stud, kept by a nut, fixed that. But the suspension action you described doesn't sound right either. Yeah, it's a pisser having to wait for parts sometimes. But I've gotten to the point where I kinda know what spares I need to have on hand if something breaks or wears out. So I'm not usually in a position where I'm going "Crap, I NEED this part, and I gotta wait a week."
Another example: My OFNA Hyper 10TT. Thing's built like a tank. But the bumpers were a little small, and I kept snapping suspension arms if I had a bad tumble or cartwheel. "Geez, did I make a bad choice of car here?" But thanks to the forums, I learned that I needed a T-Bone Racing bumper set for it. Haven't broken a suspension arm since. And I still have bad tumbles or crashes.