mainly i'm looking for route storing capability, so i want to flash to some other model firmware.
1) what are my options?
2) it looks like the PouchX 456 firmware is an option, and i like the feature-set of the 465, but is that the best way to go? i want to minimize the chance of bricking
3) if so, should i use PouchX's 3.10?
4) other than bluetooth, would any other features of the 465 not work on the 255?
Keep in mind a few things especially about the PouchX conversion of 255w (827) to 465. You can find many cases over the internet about death nuvis 255w after this conversion! Not immediate death but after a few mounts. Seems the cpu is dying. The reason is very simple - things are not so simple and the firmware is just part of a much bigger image but not the whole one.