I'm sure this sounds obvious but if you figured out the format of the control codes and how they work etc. wouldn't it be easier to add new SPTs instead of trying to squeeze it all in the available ones?
Oh great there's a typo in my account name xD
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day