Inspired by watch repair methods:
A couple pieces of hacksaw blade, de-toothed and shaped on a grinding wheel, then bent into short armed L shape, could make a fine pair of levers to get the knobs free. Apply pressure equally on both sides, with the tips well in toward the shaft/center of the knob. Fabric or even paper towel layered under the pivot point prevents panel damage.
On Feb 23, 2019, at 6:21 PM, Chuck Harris <cfharris@...> wrote:Roy Morgan
K1LKY since 1958