Thank you kindly for the offer!
I just swapped out the SH-4d for an MC-707 which has 16 drums – found a def file for that here (MC 707 Instrument Definition - #4 by Luilu). The author, Luilu, split drums into 2 Hapax tracks. Works, not ideal. But I hear that Hapax may get more than 8 lanes per track soon(?).
Anywho, no need for a def file here but someone else would surely appreciate it I bet.