ok...fail safe ..get a throttle return spring..you cant go wrong..i run one with my spektrum just to be sure...

spektrum..mine is a dx2.0.. love the thing...no issues and i even turn it off and on while running just to test the built in failsafe..i get massive range..atleast 200 mtres...other side of a footy oval no problems...but at that distance its a black dot running around over there...

dif oil,, i use 5r 30c 7f..works great no front only balooooning just allround balooooning

shocks im useing 60 wt all round with the pistons drilled to 1.4 mm..handles nice..

diffs easy to take out..front or rear..there designed to be easy to get to..

as for running ya cars in the streets and parks and stuff , just remember that ***** happens so lookout for kids/cars etc ..use ya brains..tell kids/ppl to stand back..