That would also fit on the 796D.You should print some knobs up for the smaller knob used on the old BC780XLT models! People are always looking for that one.
I think I've seen eBay users wanting ridiculous prices for a 780XLT volume/power knob. Like $30 dollars.
Maybe someone has a sample they could send you if there is still any demand for the 780 knob.
This SDS100 knob looks good!
I've got a both and only 1 set of knobs, i'd be interested. @jonwienke, i'll break out the digital calipers later and get you what ever dimensions you would need. Sound good?