Then re-assemble the control and try turning it in your fingers, holding the assembly together. Make any necessary adjustments to the control before you re-solder it back into the board. If you need to, check it with the tuning knob on the control first. The stiffness of the control is somewhat controlled by how the knob is pushed up to the surface of the radio. After the control has been put back together gently flatten the 4 tabs back into place using the needle nose pliers.
Re-solder the control into place on the display board.
Check your work and power up the radio to check the manual tuning. You should now be able to tune much easily, possibly with only one finger on the tuning knob. Finer tuning for single sideband signals This mod adds a much finer tuning resolution for the slow setting on sideband. I can pretty much zero beat every signal. You will lose the tuning range, but will gain a finer resolution.