my filter tool is a slip on standard good quality item I’ve been using without issues ever for over 20 years. It just cannot make proper purchase and spins due to how tight/stuck the filter appears to be.
Yeah, I get that, most of the filter tools on sale for Triumphs are 65mm 14 sided. While the filters are 64mm so easy to take the edges off, if stuck tight. My tool is 64mm, a real tight fit, have to give it a light tap or two to remove it. Too late for that now.
Good luck with it, sounds a good plan, let us know how you get on.