Two of blades on my 2022 Plus Four always seemed to hit the windscreen frame making a clonk at the end of the travel. The drivers side at the top rail & the passenger side at the bottom rail.

This worried me & I did think it might be partly the source of wiper arms loosening, as my passenger side had it heavy rain in Belgium last year.

The 3 blades all measured approx 205 to 208mm.

I did some research & saw that there were 3 blade lengths and then had an online discussion with Peter Gilbert who advertises in Miscellany.
He told me 2022 CXs should have 200 mm blades, I haven't owned mine from new so whether MMC or someonelse got it wrong I don't know.

Anyway with a 200 mm on the passenger side & the drivers side they work perfectly now without an audible clonk. The drivers side rubber just kisses the side rail at the top and the passenger side doesn't hit anything.

I kept the middle 208 mm one just because it works & so have a spare 200mm & two spare 208mm for emergencies.

My thanks to Peter for his help. I am as satisfied customer.

If you own a 2022 CX or earlier it might be worth checking the blades.