Peavey CS 800S Power Amp Repair

Recently picked up a CS 800S amp. One of the channel pots (potentiometer) does not work and is stuck at hi gain. I found a replacement pot but would like to know the best way to go about removing and replacing this component. Both pots are mounted on a verticle PCB and attached (soldered) to another PCB with individual wiring. Looks like the front can be removed but not sure about removing the pot dials. They are not budging.
Can anyone offer any help on the safest way to fix this without damaging the board?
 
It's too long ago I tackled these amps. It's basically most mechanical work.
If you could upload a picture of the disassembled front, I might recall.
But by then you might have figured it out by yourself. 😉
 
Update... I fixed the amp! Was a little tricky on how to get to the pots but I did it. Wish I had a video but I took several pictures. Figured how to remove the front and get access from there without having to pull any major boards.