thanks, I’ve actually went ahead and purchased Nano S.
Custom certificate got successfully installed but Concordium app installation on Nano S is erroring out for some reason. So far I made sure all the dependencies got installed correctly and that python3 is in my $PATH aliased to python. Also tried installing ledgerblue into a virtualenv and run install.sh from but there but same issue (ledgerblue.commException.CommException: Exception : Invalid status 570b (Unknown reason))
EDIT. Turned out Nano S firmware version 2.1.0 requires separate ledger app:
more: Error when trying to install ledger concordium wallet - #8 by s-grind
download for 2.1.0 firmware: Error when trying to install ledger concordium wallet - #8 by s-grind