Hummel Aircraft - Here is an Ultracruiser completed by Steve Grensky and a build partner in Grants Pass, OR, that uses a Hirth F23 engine. Sounds like it was finished around October
Hummel H5
Hummel Aviation Ultra Cruiser Plus Airplane Desktop Wood Model Large Free Ship | eBay
1700R Hi-Max Aircraft Kits and Plans - Team Mini-Max, The World's Best Ultralight and Light Plane Kits and Plans.