I've never seen a Pooley's whizzwheel but presume that it is pretty standard in layout ?
From training work I've done in the past, I did some detailed reviews of several styles of prayerwheel (Dalton, Jeppesen, and Aristo) and all worked fine. Most of the Daltons I've seen don't have highspeed indices available so that will present a problem for jets .. but, for lower speeds aircraft all were fine.
One of the main problems was oddball shortcut techniques which weren't always consistent with the design of the instrument. Indeed, I have had well-meaning folk who really should have known better tell me all sorts of outrageous ways to misuse the devices ...... sometimes it is just easier to give up rather than show them the technical error of their ways ....