Hi drdalet,
great piece and playing.
I have created several Multipads of my own on my 9000Pro.
I tell it's definatley not easy.
Unless your timing is a 100% and I mean 100% it will sound off when used with a style.
My Multipads are only 1-2 bars long, so it is a little easier for me.
The only way I got around it is by programing (playing) it with the tempo way down so I could be exactly on each beat.
Another problem that occurs, when you loop Multipads, is with the last note played back to the first note. This is where your timing has to be exact.
I had to record mine several times before I had it right. But it is a lot of fun.

I hope this helps...
BTW I couldn't really detect any timing problems, since there were several Instruments playing at the same time.
The only thing was that the whoke song jumped a couple of times.
Thanks for sharing

Eric