I haven't used Tominon lenses specifically for copy work but I have tested the 135/4.5 for resolution at approx 1m. It seems there are many alternatives (enlarger lenses) with better resolution (both centre and edge).
i have and have used a 127 4.7 for both general copywork
as well as regular old photography.
even at infinity it covers a 4x5 sheet of film fine ...
there are always reports that the 127 won't cover a 4x5 negative
but mine was sold to me on a speed graphic back in the 1980s
( i bought the camera at ep levines in boston ) ...
great little lens usually found in a self cocking prontor press shutter
so the only drawback i have found the lens is that the shutter only goes
to 1/125thS ...
all that said, for copy work i would rather use a gclaron ( it screws right into the same shutter )
John, I don't know why, but the 127/4.7 Tominon as sold in #1 Copal Press for, e.g., Polaroid CU-5 and DS-34, is much better at distance than the MP-4 135/4.5 Tominon. Years ago I bought a CU-5 one for the shutter, tried it out on a 2x3 Graphic, and was so pleased by it that I put it in my out-and-about kit. I can't speak to its usefulness on 4x5, but its great on 2x3.