Are you looking to extend your existing track, or replace it due to damage? Whilst it’s possible to mix & match tracks from different manufacturers, I wouldn’t recommend it as there are subtle differences between the brands - even ‘quality brands like Makita & Festool - that can make life difficult, depending on what you want to do. I have a video coming out on the subject soon, probably next week, just FYI.
As an example, Makita tracks have an extra ‘anti-tipping’ lip on the Upper-facing t-slot that interferes with some accessories eg parallel guides or rail stops. Also, the main ‘rib’ that the saw runs on is slightly under size on the Makita rail - only by less than 1/5th mm, but enough to stop my Festool saw snugging down onto the rail, which could cause issues if you join Makita & Festool rails together.
That said, I picked up a 3-metre Makita rail back when they were 1/3 the price of the Festool equivalent, cut it down to 2100/900 and it’s been excellent - but I don’t try and mix it with rails from other makers.
HTH. P
