F2T 63 (dunlop site, unstrung) 67 (TW, strung)
M2 65 (dunlop site, unstrung) 70 (TW, strung)
F3T 62 (dunlop site, unstrung) 64 (TW, strung)
F5T 69 (dunlop site, unstrung) 72 (TW, strung)
so they are getting stiffer when strung, i thought it's usually the other way round
