Magnecor leads will set you back £70 or so, so why fix it when it ain’t broke? On the other hand, the plug corrosion issue is well known and bound to return, so you would be better spending your money to address that. (Cam cover etc)

Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900