our ford transit van is just stupid there is one knob for the radio volume, the rest is on this 12 inch screen. my dogs wet nose does all kinds of things to it you dont want.
at macs in the cheap tool rack i bought a set of uni bits, cone shaped stepped bits. best bits ever all of a sudden they have been used for 6 years and still drill. they have drilled a lot of stainless steel.
I have hit rocks and cracked them but ive never had one stress crack and we beat the hell out of them. i believe there is a guy that sells a tank where you cut the top off the old tank and it sits in the belly pan. rust seems to be the biggest issue.