How were you envisioning switching between programs? As far as I can tell the field programmer only holds one program at a time. For my circumstances it isn't practical to bring our products to a PC, and I don't think I would trust my production floor to swap SD cards all the time without losing them or just inserting the wrong one at the wrong time. Do you know of any other model programmer that allows for something similar?

Luckily on my design none of the data or clock pins are tied together, so that only leaves the MCLR pins between two chips I would either have to jumper like you both mentioned or just program one at a time. I would have to think about which is more practical/economical.

Thanks for the feedback so far.

Any other ideas are also appreciated.
Thanks
David