T16000m TWCS chair (DRIFT/NEWSKILL...) mount and adapters for 30MM arm tubes

this is a remix of @Stopin chair mount https://www.thingiverse.com/thing:4633636 and @TaShadan adapter https://www.thingiverse.com/thing:4928409 for T16000M and TWCS.

Arm adapters for 30mm diameter tubes added as well.