Can i ask why you are mentioning the Carpel Tunnel syndrome in your letters? – I wouldnt, unless you are applying via an application form and it asks about disabilities i wouldnt mention it, until the interview stage. Now people will likely say this is wrong, but i dont think it is. Remember they are looking for reasons to NOT interview you, by mentioning it before you get that far, you effectievely give them a reason to dump your CV