Any Roland GR-55 users out there?

[MadMax]

I just wanted to see if any of you all are using the Roland GR-55 processor? I heard a neat effect on a tune which was most likely studio effects, but I am trying to duplicate it with my GR-55. My inspiration can be heard in Rob Crabtree's Celtic version of Amazing Grace. The way it fades out gradually, with increasing reverb, gives the impression that the bagpipes are marching away through a valley. Anyhow, I'm close to perfecting this on the GR-55 by assigning the expression pedal to reduce amp volume when rocked back, while simultaneously increasing reverb level. I'm still fine tuning the min and max parameters to really capture the effect but its getting closer.
Any GR-55 users in this forum, I'd love to hear how you all are using yours.

MadMax