Well yes, the original mounting type of the U47 will make the MK7 board a little hard to put inside, but the larger of the MK7 board is 45mm, and i believe and looking at the 51 mm tube and the rails i'm pretty sure it will fit inside that, if the website was a little more precise you could check that, anyway yes 60mm leaves plenty of space of course, and Skylar's body is still more DIY friendly in a way...
But i'm sure you've noticed that, but it's always a good thing to have choices...