@rhodeisland, thanks for the link to the weld nuts...looks very similar to the flower nut in the ht engines clutch nut...
@avalanche, very nice idea...looks like you could even stash your wires up under there...
Personally I use plumbers tape and some flat washers...but the threaded rod couplers look perfect...theres definitely a few great ideas here...and anyone whos taken their gas tank off fire whatever reason knows the bolts are crap...
Oh and I fold a piece of bike tube, and place it under the tank at the bolt points...helps vibration and helps stop the tank from slipping or spinning upside down...