The word instructions should be the simplest to be assembled; let's support the trivial forms as the first stage, that is, those which don't involve "magic" operands and operate with integers as they come.
In insndb, the assembler has dropped "custom instructions" workaround and now deals with insndb directly. pysvp64asm lost more than 600 lines.
I suppose this can be closed; Luke, I'm leaving it to you to deal with MoU and budget.
As parent task is completed, I'm marking this as resolved.