Thanks, that's what I'd thought which is why I wanted to see if a firmware update would fix it.
The bamboo & triangular styli definitely don't work on the reader, the intuos I wasn't really expecting too as it's a strange one but figured it was worth a try. It's hard finding specifics on the original max vs the newer ones, but threads
https://www.mobileread.com/forums/sh...d.php?t=190524 for the older boox units do suggest not everything is as compatible as I'd assumed.
I'll run the update tonight and see if that helps anything.