Finally got all the demons out, and got some pics under the ramp truck a lil bit ago.
The burnt grease on the exhaust, and undercarriage, is from the faulty front seal, and being overfull. That has stopped, since replacing the seal, and filling to the proper level. When I get the vent rerouted, I think the spitting will be finished, also.
It's also a little filthy, because my last test run was out to a friends farm, about 10 miles out in the country.