Does anyone know if the lensboards for the Horseman L-series monorail cameras ar e compatible with Sinar lensboards? How about Toyo or Wista monorail lensboards ? Note that I am talking about the big lensboards, not the ones on their field cameras. I have a camera that (supposedly) takes the Sinar lensboards and I'm l ooking for a less expensive source of adapters, etc.