I have call­backs (some), ge­om­e­try man­age­men­t, LED files load­ing (re­source files) and it seems no hard parts are left.

That would mean the re­main­ing work is routi­nary, even if it's a large amount of it.

It's nice that I can switch back and forth be­tween the Mo­tif and Qt im­ple­men­ta­tions just by set­ting LD_LI­BRARY_­PATH to com­pare :-)