I'm seriously considering trying to find some type of squirrel cage fan to use. I'm not happy with the dual 4" computer fans. They do not move enough air through the exchange to heat the cabin sufficiently, IMO.
The problem is roto-molded polyurethane is not strong enough for the structural needs. This is why fiberglass is still being used, with an updated resin which is better resistant to modern gasoline additives including ethanol contamination.
This plane has cleared the probate system and is now officially for sale. This forum has first dibs before it goes on Barnstormers. 2006 Avid Mark IV Subaru Status conversion with Belt Reduction Drive is for sale,Owner Passed Away Avid comes with Skis and Wheel pants Hangared & Based at KRRL... North Central Wisconsin $18,000 OBO with enclosed Trailer $16,000 OBO with out Trailer Contact Steve Krueger if additional pictures or info is requested. Kruegerfly@aol.com 715 204 2928