I have a piece of hardwood dowel with small cutouts to accommodate the safety catch 'wings'. It was a bit daunting the first time but as long as the action is held securely in the compressor it's actually quite straightforward. Check out I.J's disassembly photos and make sure you use wire or something like it to tie the safety slide tightly to the trigger block (at least either side of the trigger) as you withdraw it. I use strips of plastic coated garden wire.