Good luck with your design and and production of the FPGA storage wallets. I think that it a great idea and wish you the best of luck in your execution.
I'm not sure how hot they might become, maybe look to an anodized aluminum for the construction of the case Gold in color with the BitBar logo whatever that may be
thank you for your support !! its rare for people to be positive around here. Will be sending beta tester proto-types , saved your Username and will be contacting you to help me if your up for it