Loco has a dm and im pretty sure he has the dm shearers too. But you and mat are right about the big bore pipes not fitting stock/cub jugs. I tried a set on my 421 and they hit the lower frame rails. You'd have to raise the front of the motor about 1" to get em to go on.
how much are you being charged for studs and acorn nuts? sounds pretty high at half the cost of a head. i do like the chariot head though and looking back i probably should've gotten one instead of my pd. i like the one piece design.
What's your setup? Mine is a 421 cub with sb shearer inframes, 35 pwk's, vf2's. I really haven't ridden mine enough for the rings to seat but my jetting feels close. Im at 300' asl.
maxxmaxx for sure if you want durability and battery life. battery has about double the maH as most smart phones, gorilla glass and kevlar back for durability. the wife has one and i like it.