Gerry, Moose Jaw Saskatchewan, now I learned of a new place. I took a look at it on Google. It's on the Trans-Canada highway. The Snowbirds seems to have a base there. Nice airport!
I took a look at Polymaker PC Plus. I didn't know it existed. Yep, the temperature and strength is higher. I think my printer head can reach the temperature required. I will order some an give it a try. However, the ABS with the fiberglass reinforcement is sufficient for this part using the small box heater. It doesn't take long to heat the engine. I'll put a thermocouple on the engine and measure some temperatures and time for grins.
Appreciate the comment about raising the heater off the floor in case of a fuel leak since I heat the engine using a switchbox and remote cell phone. The heater is on boards that raise it 1.5 inches now. Need to look at all electrical connections and get them off the floor. Heater = $15, adapter to heat box = $6, flexible duct = $10.
I have no thoughts of recirculating the air to the heater. The heater has an internal temp limiter. If I did that I am sure I would over temp the heater and shut it off. However, I am planning to make a duct that will fit the nose cowl to allow heating from the top so that when my knees are too sore to crawl under I can heat from the top.
Is the fishing any good in Moose Jaw Saskatchewan?