Hi Clare
I've been at Woolfest looking at Shetland fleeces... and yours compare very favourably.
What staple length do you get on the Castlemilk Moorits? I have just a little bit that's long enough to spin, at last! from my one first-shear, the other's not quite ready and should have a little more usable, I think.
Spinners on Ravelry would bite your arm off if you offered any CM fleece for sale - if you could be bothered I would guide you in how and where to advertise it. I think you could sell your Shetland that way too, although that's easier for folks to come by.
Let me know if you want to have a go?
Hope all is well with you both, and all your lovely 4-legs
Sally xx