The thing with buying a new car without doing research is not having the nerve to learn everything before going and using it. I did about 2 years old pure research before finally getting mine half a year ago and im very glad i did learn before buying. Just take a couple hours every night watching or researching tuning videos and setups. One guy i cant recommend enough is Nitro RC Nerds on youtube, He has a hyper 7 too. About servos, Dont go cheap. Just go full out best servos you can, Its better buying 2 durable servos which are expensive but last many years than getting 2 for half the price which last serveral runs, Something i learnt very recently.