The hides are from October (came up good, it was 5 months old animal), February and May (they had sheds), I salted them immediately after skinning, left in my garage. No idea of the temperature, humidity etc
I definitely skinned the October one much better, but the tannery told me as long as I do not leave pieces of meat thicker than a thumb, then I should be ok. Therefore, I skinned other hides not as carefully. However, I do not think I left anywhere pieces of meat thicker than quarter of an inch. Even then, they were quite small pieces, not inches long, maximum one square inch surface
Next time, I will follow advice of VSS
The Welsh Tannery accepts only salted skins, no row ones. I did not manage to find anyone else in the UK... There is a tannery that makes skins. However, I do not know what I would do with a skin though have a muntjac's hide at the moment (Welsh Tannery won't accept it as they said they cannot guarantee the quality)