Feature request: Scanner calibration

I use an A3 scanner (Brother MFC_J6920DW) which has an A3 Flatbed with a centrally aligned document feeder. This means I have to re-calibrate any time I need to switch between the two modes. This is, to say the least, somewhat inconvenient.
Would it be possible to have more than 1 calibration setting for this and similar devices?
For me. this would make an already brilliant application perfect!

Would having a calibration for each scanner source fix your problem ?

Yes, I very much think it would.
Paul N