OK, so to summarize, messing with the data on the cards is a big NO NO. Just use them to back up your own presets – end of story.

 Dumping a preset via midi is OK, as is restoring it via midi. The worst that can happen is the restore fails and that preset does not work.

 If anyone wants to swap patches via midi dump/reload they do so at their own risk but the worst they can do it screw up a single preset.

 Is that a fair summary?

Cheers

 Ian