half of the frame list data is used as bankswitching information, so it can be cut in half if it's not needed (there's no option for that now but I can add it). It might also be possible to create a lookup table and get down to a single byte/channel (with some overhead for the table). I can create a special optimized version if you want. I've also had some ideas on how to compress patterns by looping repeated parts... but other stuff has been prioritized (I can look into it now).