Last weekend at club swap meet, I saw an HBR 16 home made Receiver, (60's vintage QST project). The builder had taken a stock National dial, and added a Jackson Bros. (England) 6:1 vernier drive at the center shaft behind the knob. I think you could submount such to the panel of the Ten Tec, behind the present front panel if there is a couple of inches before the tuned component. Stuart K5KVH