I have a 514, DON'T get an XT wheel set, as above the free-wheel is poor but worse than that is the replacement spokes end up being nearly seven quid each and Madison never have them in stock, crap if you ask me.
Front mech is a direct mount on mine, not sure about the never ones, if yes then you need to get an Etype front mech and take it off of the mounting.
hope this helps and remember DON'T BUY AN XT WHEEL SET the rims are also made of cheese, but are very easy to set up as tubeless 🙂