I have a Mammoth ST. Wondering what the catch is on the 350 price tag? There is none... It's just a special introductory price. In a week or so (I think at the end of July) the price will go up to its normal 420 price tag. At 420 though, it's still a great deal. The Mammoth ST is very easy to work on because of its simple chassis layout. If you want to work on something on the truck, you don't have to take a bunch of other things apart like on the Savage. The ST took 1st place in the Truggy class A-Main at the O'Donnel championships a week ago.