Bc2000 (for the BCF2000 & BCR2000)

So I'm in the process of creating a pretty fully implemented patch
(set of them actually... ) for alesis quadrasynths (i'm using a QSR)
and ran into a few issues with offsets in sysex messages. 

I've been using the alesis sysex doc (which is very comprehensive, but
wrong about a few things... go figure...) from their website. I've
been figuring out the commands by watching the output from a software
qsr editor that i know works.

A basic program parameter changenlooks like this:

<header 6bytes><mode/function><sound/page><channel/pot><val><F7>

So for a filter freq change i've got this on a rotary controller:

$F0 $00 $00 $0E $0E $10 $44 $00 $07 val $F7

and it works like a charm.

Now, when I read the output of another parameter change (Vel>Filt)
from the software editor I get <06> in the 9th byte but then it
changes to <07> mid-way through a revolution of the slider in the
software. I know this has something to do with an offset b/c in the
sysex doc from alesis this parameter shows up as having an offset of
-99 (the filt freq example above showed an offset of 0). My problem is
I have no clue what the offset means, or how to use it to program a
single rotary controller in bcman to adjust this parameter fully.

I'd love some help. This is taking a lot of work and when its done
I'll post the whole thing here for everyone. No more quadrasynth
menus! I just gotta get over this hump.