12-09-13, 10:12 AM
They can be a bugger to get off if you aren't prepared to put in some muscle, but getting them back on is a doddle 
I think I ended up using a few flat bladed screw drivers as wedges to drive the cover off a bit so that I could pull it off

I think I ended up using a few flat bladed screw drivers as wedges to drive the cover off a bit so that I could pull it off