DG's arent bad pipes at all. They do have set-backs, but if the price was right, run em!
Only things I found was, the ones I had didnt have o-ring flanges and they didnt clear the petcock (like said before). Other than that, they were good pipes! If tuned prorperly, they will rip, and run with alot of the other pipes.
Sounds like u got it running well- just check the plugs every so often. Those little babies are the most valuable part of the engine, without them u cant run, and they tell you whats goin on with the motor.