Bc2000 (for the BCF2000 & BCR2000)

I seem stuck here, .txinterval 2 is awesome for mackie emulation,
but sucks for vfx editing, errors out all the time it likes
.txinterval of 100 but his is way to sluggish for Mackie emulation!

Is there any way to have .txinterval be a $preset var instead of
$global or is there a way to change the $global param with each preset
change.
Any other solution, besides buying another bcr2000!

Thanks
Kip