As many of these tips probably are, this may be obvious to some, but last night, I made a very cool discovery with pickup machines. I have always used multipliers on slaved pickup machines, like x1 or x2. So every slaved loop is 2 two times as long as the master, or whatever multiple you happen to select.
BUT! If you turn the multiplier setting to off, you can select how long the loop is, in sequencer steps, in the recorder setup menu. I always assumed that pickup machines were excluded from poly-rhythm mayhem, but this is not the case!
I was really happy to find this. Sorry if this has always been blatantly obvious to you. It was an exciting discovery for me 