ok. started a new job, so progress has been a bit slow, so i'll post pics of what i have done now... or at least what ive got pics of anyway. sorry for the poor quality pics. these are from the cell phone...
started the tube crossmember
added a few more tubes
a few lateral supports
-- kinda looks like a scorpion, huh?
some 3/8 plate and a ball
mounted up some air tanks, and some itty-bitty thomas compressors (strictly for backup)