The barrel type adaptors that ca me with my Ferm saw were a pain. Especially trying to get the bottom one through the plate. Until my new Axminster clamps arrive I simply took the neutral pin from a 13amp plug (earth was a bit bigger) and cut the screwed block off. Works a treat. I had tried the inner from a block of terminal strip but it was too small. Bigger block would work, just didn't have any to hand.
Regards
Andrew
Regards
Andrew