Well that's a long story. I use to have 2 Horseman VH 6x9 set ups for landscape photography. I was in love with this little camera and regretted selling it.
After going digital I bought the 17, 24 and 90 TS-E Canon lenses and used them vastly for a long time. For shifting moderately it was ok, for tilting always found so difficult to get the proper amount of tilt + focus shift.
When I about to get the D800 I started the search for a hole new system with flexible lens mounts and reasonable tilt shift.
I went over the Silvstry, Cambo and Horseman. I ended up choosing the Horseman having shift movement in the back standard which is very good for stitching, other is how small, light and convenient this little camera is.
In Luminous Landscape forum I ask Simon Harper who owns and worship this camera as well and he show me the best lenses for it which are actually very chip, the APO Rodenstock N enlarging lenses. Also there is an adapter for Hasselblad, and Pentax 645 lenses.
I own several Pentax 645 and mostly interested in the 35mm A on this combo. It is a bit tight to use but still can make an 75 mpx stitch with it equivalent to a 28mm lens.
With the MF lenses the tilting capacity is not good. Image get or sort of distortions, so the quality is not acceptable for professional use.
In this image you can see what I mean for tight:
Best ACH