Looking at my pile of Sinar parts, I realized that I could almost build a Handy type camera. The only missing link is the focusing Helicoil.

Given the thickness of the Sinar standard, lens boards, back assembly, has anyone here found an easy, nearly off-the-shelf and inexpensive way to focus a wide angle lens? I don't own the lens yet either, so I'd maybe even follow your advice and get what is known to work (a tiny 90mm Angulon would be ideal to me).

I have a Linhof Technika lens adaptor and am wondering about sticking a Linhof Wide Angle Focusing Device on the front but I don't know how much throw one of those has?

Or the Jin Finance Helicoil on eBay that is mounted on a Technika sized board... has anyone used those?

Or a broken 35mm SLR lens body?

What have you done that is known to work? Thanks