I'm building-up an 18" Performance Aluminum MTB Frame that I got on clearance with spare parts. The one thing I need is a rigid fork. I think that I need a 100 mm suspension-corrected fork (threadless), w/ 45mm rake, but Performance "live help" is DOA. Has anyone else done this project, and have insight? I also have a threaded headset, so if anyone has threaded dimensions, that would be awesome.