It's been a while since I managed to get the bike out thanks to the Easter hols and child care but I'm pleased to say the bike revs happily over 5k with no issues.
Had a couple of runs through 2nd, 3rd and I think 4th (on a private road obviously) and absolutely no issues to report other than a stupid grin under my lid.
Next stop bars and flywheel. May have to wait until the end of the summer though so I can actually get some miles in this year.