That looks beautiful, Rhys.

Don't fret over it being a 26mm. Some may say to lighten the piston and reduce the stroke slightly, but with just a very mild fettle it will still be lovely. And many shoot beautifully out of the box. If the spring is good and the standard (and very good) guide fits the spring nicely, a top hat, polish and lube will be just fine and just shoot and enjoy.