Wow that Protek CLP has made a world of difference. My previously most resistant roller boards are now the ones with least resistance. Its tempting all lubricate it all, like I'd do with a push bike, but I'll resist the temptation. Thanks for all the advice.

Interesting - not many WIllis IIs around. Though that one was originally in yet another building, and for a third of the 40 or so years since its move to St Andrews it seems to have been in storage having never been put back after a church restoration, I wonder why not. It's very similar in size and specification to the Hill which was originally installed in St Mary's. After only a few years that was felt to be too small so underwent a radical enlargement from which it evidently never quite recovered from, followed by a neobaroquification to add insult in injury perhaps. I wonder what future modifications lie in store for the Willis?

also St Monica's, Bristol (H & H) St Mary's Episcopal Cathedral, Glasgow are acquiring the Willis organ from St Andrew's RC Cathedral

Janaček’s Glagolitic Mass at the Prom concert: https://www.bbc.co.uk/sounds/play/m0022465 The Mass starts at 1:36:20, the short yet tricky Organ Solo, played flawlessly by Christian Schmitt, at 2:13:30.