On any given day I usually use the HK on both the FS and FSK rails to do many things... Cross cut at an mft using dogs and an fs rail, rip on an fs, cross cut with the fsk, short rips with the fsk, miter cuts,etc. Yesterday I played with plywood inside in the morning and went outside I the afternoon to hang finish fascia and crown moulding at the cornice. The fsk rail allowed me to dial in the correct compound angles for the crown on the outside corners of an out of square roof and it's less than half the weight of the compound sliding miter saw without the bench....