answers....
Yes, that is a Bob V 2 wheel low kit, and I must say I would be lost without it. An absolute must have for anyone doing much backing. The other switch on the gear shifter is where I manually operate my Pacbrake. I have found it to be much better to eliminate the under pedal switch and wire it direct.
As far as the Dot sleeper is concerned, I don't usually spend alot of time back there. I go for the hotels when possible. I have been looking for rules on sleeping back there, and have turned up nothing. I have found a few size diminsions as requirements, but nothing that looks too serious. I do see alot of other hotshot regular cab trucks and daycab tractor trailers with the driver asleep across the front seats or slumped over the wheel. I am pretty sure the Dot does not like that. My understanding is that the Dot wants you out of the drivers seat for 8 hours.
If anyone has any info on this I would love to be enlightened!!!