That shouldn't be a problem, you can build the long term bend into the tolerance of the slot-
or in the short term, unbend it just before the exposure.
My darkslides are quite straight when I remove them from my holders-
certainly straight enough for a shutter-
Of course, other materials could be better- copper sheathed printed circuit board should be dimensionally stable enough.
It's obvious this is a workable thing, it's not a new thing-