How do you get the rear pad off the stock - it looks to be glued on mine and I'm loath to take a screw driver or knife to it in ignorance
It is screwed on bowjijohn. The "holes" in the recoil pad look more like razor blade slits (which they are). They are meant to be invisible, but you can find them easily if you apply finger pressure on both side of the pad to open the slits:
I intuitively tried a Philips bit first, but the screws on mine are Allen (or Hex") head 3 mm.
You can use a T15 driver in them too, but the fit will be loose.
This, from BeeMaa, is excellent advice. A drop of liquid soap works great, or even a dab of saliva in a pinch...
Put a little lube on the screwdriver shaft and the butt pad.
It keeps the rubber from grabbing the shaft and twisting.