[Central-Electronics] Removing coil covers of the 200V

[Kihwal Lee]

Hi,
What is the easiest way to remove the 2nd mixer and the driver coupler cover?  I see small a screw at each side, which doesn't look easy to get to.
Also, did anyone else have to raise the heater voltage of the V1 mic amp to bring the plate current and voltage per spec? At 3.7V, there was very little plate current. I had to shout into the mic to get any output or VOX work.  When I raised to about 5V, it worked normally.  I tried with multiple NOS 6BL8s and microphones.
73,Kihwal, K9SUL