I just recently bought a GP 30 and want to get another for a lash-up. Can I expect both engines to have pretty close to the same power at any given controller setting? If one of them has a little bit more power and it is the second one back, wouldn't it be putting too much strain on the coupler of the one in the lead? Or do you run them and if there is a difference, the faster of the two is the lead engine? Also, do some of these diesels make more noise in reverse? Is this normal?-----John R