Hey Alfax
I'm on a T3, and when I use the workstation for percussion, I use Real time. To build a complicated pattern, I set the tempo slower, and depending on the intricacy of the piece I time it at 16:16 or 32:32. For a basic 4:4 or 2:4 time, I'll generally record it at tempo.
For some pieces, let's say you've got a single snare hit to begin the song, you can begin with a single bar of 1:4 time followed by the regular time signature. Naturally the same rule will apply to 3:4 time, 2:4 time, 5:4 (Sting) time, whatever....
I'm also using a Roland R8, sync'd to the T3's clock. Works for me...
Good Luck!!
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...L