I used the 35mm/4x5 combo 10 years ago using a canon t90 and a
sinar f that had a converted lens board using a canon t-mount
Last year when I bougth a D30 I made a adapter for my Sinar P2, I
use enlarging lens of 100 and 150 mm, but my procedure is
different, I did some test for vigneting, and found out that I
could use a " negative size of 6x4,5 cm, I shoot still lifes
composed on the Sinar groundglass fitted with a mask for 6x4.5,
when done I substitute the ground glass with the camera plus
adapter, refocus and then with the micro geared mechanism of the
Sinar I go up 14 mm and 20 mm to the left, I shoot, move 20 mm to
the rigth, shoot again another move to the rigth, then down 14 mm
and the sequence to the le left, then down and to the ritgh, in
total 9 frames in a matrix of 3x3, it is done is under 50 seconds,
the stitching in any suitable app takes under 15 min, The result is
a 6000x 4500 + pixels image. now with the D60 the images are about
9000x6000 pixels. of course can be done with less images covering
a "smaller " format. This is a kind of " manual scan back '
A interesting option is to use a Shift lens. with My Scheneider
Courtagon 35 mm I set the camera vertical, offset the lens to the
left, shoot and offset the lens to the rigth, shoot, stitch is very
fast here, may be a minute, and there you are with 3000x4000 pixels
image, your first 12 Megapixel camera
Regards
Jose