Regarding the regulator vent distance, the code is NFPA 58 188.8.131.52, in case the gas supplier asks. Others have mentioned that local codes may require a greater distance than 5'. I believe Skip previously mentioned 6' in his neck of the woods.
Our regulator is within 5' of our generator, however the vent in the regulator is piped almost 6' away from the generator. See the code for more details on piping permitted.
Thanks, 'genme,' I found the NFPA and read the relevant section, and I'll consult with our supplier about those specs. I'm sure that 5' would do it here.....in our county, I doubt if you could find anyone who's even heard of the NFPA, outside of the one municipal fire department and a dozen volunteer FDs. Along the same lines, I suspect that the electrical contractors are the only ones who really see that the NEC is met....or not.
Meantime, today I ran section 2.4 of the owner's manual, "Electrical Checks," and everything tests within spec. I don't have any way to check the frequency output, but expect to have that soon. Next up are the load test and automatic operation. That ought to wrap everything up except for putting it into service.