I've had a Sansui G-6000 missing a tuner knob (for way too long) and just found a G-6700 that isn't working. Do those knobs swap between the two different families? Be good to have a whole unit even though the asking price on the G-6700 is high by $70.00 or so. Fixing the G-6700 would be at the "save" level....parting it out would be wisest, but I tend to "save" over profiting it seems. (Different kind of "profit" to me I guess.) Appreciate it you guys.