Looks great.
Page 18, section 50 will show you what you need to get, radio tray and the servo mounting brackets, plus some screws of course.
http://www.ofna.com/pdf/Hyper-St-PRO_FULL-MANUAL.pdf
The diff oils, I read a few people used those weights when searching, so went with it. I was happy, but depends where and how you drive it I guess, there's like a million different combos you can have.
I had no problem jumping it, but maybe I was more used to it, having had 1/8 buggies.