So, like many here I managed to sort out a lockdown project, namely a 5E3. I've practised my tolexing already with a FET Reverb, but I need to raise my game and get brilliant corners. Like these corners below - specifically the 90 degree corners on each edge of the control panel How do you folks do them? Fortunately I kept the sharp edge in the middle of the roundover (if that makes sense). But how do you select exactly where to cut? This seems to be one aspect I've not seen on Youtube etc etc etc. All advice on cutting corners appreciated. I used a scalpel which I think was a mistake, a one-sided sharp razord blade kind of rotated on that sharp edge might work. But what are the tricks to get it neat? (PS I don't mean the internatl bend, where we add the little extra triangle, which wasn't too hard, I mean the corner on the far left int the first pic, at where the control panel recess meets the back side of the amp). Also, there's this supernatural vintage example at the bottom that seems to have no cut line. I can't begin to see how this was covered. Ideas?