I haven't posted in a couple of months but I will answer this one.
I love the BK-7m. I'm using it with an Edirol controller. I can call up 50 commands with button pushes from it.
I have programmed the variations, endings, break, etc., and about 20 of my favorite sounds. In addition I have two foot switches for the controller, one for the module, one for the harmonizer and a Roland FC7 if I need it. That's 9 more pedals than I have feet.
I am now setting up buttons to call up my 10 favorite "go to" registrations.
It is far from perfect and I have to bring a mic processor and laptop or tablet for text display. I was doing that anyway, so no big deal. It is a very deep machine and you can do pretty much anything you want with it, but it takes a little time and effort to get comfortable with the editing of the controller. Roland does provide excellent free software for this.
I am active on both the roland-arranger.com forum and the Yahoo BK-7m forum if you want more info.
I'm also hoping this board can get back to being more useful. So far I haven't missed it at all, other than many of my friends, the ones that haven't been run off yet.
I will be posting some songs on my website in the near future. I won't be posting any here.
DonP, you can link OTS to style variations if that helps.
Unfortunately you cannot yet edit and save OTS settings on the module. However I can edit and save them on my E50 and transfer them to the thumb drive and they work fine.
My setup time is about 10 minutes. Heaviest thing I have is Bose Compact at 28 pounds or so.
DonM