I fitted my 25mm spacer from Revolutions today & echo Chris's comments. I can now fully get my foot of the clutch. I did not have the special tool to fit the head on the security bolt but managed with a screw driver.
Seems MMC are missing an opportunity here leaving it to dealers or DIY route to fulfil a need. Why don't they offer a range of different thickness spacers & put it on the options list or accessories?