Maestro control drag

[{"insert":"It's easy to use a felt washer to minimize the tendency of the concentric knobs to interact with each other. I used 1/2 inch felt furniture pads from Home Depot and punched a small hole (about 1/4 in) hole in the center of each knob to turn them into washers. Then remove the rubber grips on each pair of concentric knobs and use a 5/64\" allen key to remove both the inner and outer knobs. The washer goes next to the panel, in front of the larger knob. Slide the larger knob onto its shaft until you have the desired pressure against the felt, and tighten the allen ****. Then attach and tighten the smaller knob to the inside shaft, leaving enough clearance to prevent the knobs from rubbing. Reinstall the rubber grips and you're done. This could be done easily at the factory in about a minute per knob. BTW, I was pleased to discover the knobs are actually nicely machined metal, but the absence of friction gives them a cheap plastic feel.\n"}]