Reversed cine lenses are fine for some things, and the revesed Componon will be fine for some things. But using such short lenses give you both short working distances AND high magnifications.
In this realm, a plain focus screen ( which is essential for 1x - 3x work ) stops discriminating between the focussed world and entropy. You need a clear glass with a reticle AND and 6x finder so you can see the reticle clearly.
Unless you just want to fool around, and that's fine too.
But just as a 28mm changes magnification with the smallest movement,
it magnifies camera motion, focus error and all those little nightmare issues, as well.
As a result, enlarging the film to gain greater magnification becomes more effective than using a higher magnification.