Any of you 7+ string guys know of any options for a high F string? I am currently using a Dean Markley stainless roundwound .022. This string is just too bright in relation to my B-C strings which are D'addario nickel rounds. I'd like to stay close to the same diameter (maybe a hair larger) but try something like a flat/half-flat wound nickel string to get it a little "mellower". I've tried using flatwound guitar strings from GHS and Thomastik but they are all too short for my 35" scale. I can't even get one winding around the post and they pop out. Any ideas?