Last last year I bought a cannondale slate with a rigid lefty. I noticed at the time that the fork seemed to have mounts for a mudguard but no amount of googling brings up anything. There’s a mount at the dropout and also a hole in the crown. Does anyone know what these are for if it’s not a mudguard? Be great if there was a mudguard for it!

Could do with one.

Not using the fitting you describe but an SKS shockboard, with a (seperate) adapter will fit. Previous owner of one of mine had stuffed a piece of rubber tube up the headtube (think a section of thick rubber hose) and the sks adapter fitted inside that.

It would be a LOT easier with a second fork leg.

Nothing useful to add other than to compliment you on the quality of your slabs, woodwork and delightful cladding. Not a paving crack weed in site. Small fence could do with a lick of paint but it does compliment natural aging of your cladding. 9.5/10