Shakil,
Are you sure they are not multitemberal? I had a keyboard that allowed you to assign patterns to keys, and it didn't take 80+ keys to do chord changes. You just assign the pattern to a key, transpose it and move to the next... I don't see how you need 80 patterns. If you make 4 variations and 4 chord changes per variation that falls well below 80 patterns.. You then just go into the pattern track and chain them together. Unless there's something I'm missing that you're saying