I've got a TS55 with the stock 48 tooth blade and when I look at the Festool site the 48 tooth blade (listed as "fine") has a 2.2mm kerf, but all the other blades have a 2.5mm kerf. If I switch to a different kerf size, does that imply that the rail guide strip will be cut differently as well? Or is the std 48tooth blade also 2.5mm (and not listed in the accessories section)?