As far as I remember, I did some rough calculations as to the additional displacement of the progressive springs to account for the heavier guage of the springs and the fact that the tighter windings live at the bottom and came up with an air gap of 170mm. This is about 25mm bigger (more air/less oil) than stock. (When I fitted the linear Ohlins I went back to the standard gap.) SAE10 is definitely more effective than SAE 15 with progressive springs at achieving a compliant ride.

Thanks mate, I'll tear them apart this Winter.

Does anyone know for sure which way up the Rebound Spring on the Damper Rod goes? It came out with the wider end nearer to the ground but it fits way better with the narrow end toward the ground? The diagrams show the rebound spring as the same OD all the way up so it's no help.