Methinks tis always a good idea to talk to MATZ controllers. they give a lot of useful info and if you tell them your route, they often contact any other matz along the way and pass your details for you. You then just have to change freq, say "hello", and squawk **** and your sorted.
Mind you, I have heard about how you don't need to contact them if you don't want, but if your flying 'cross a CMATZ like Lankenheath, who would'nt!? Nevermind if tis legal, tis common sense, and saves you having any mild heart attacks or strokes
FFW