Gram - Thanks for the tip.
Debra - Funnily enough, after I sent my last post I went and checked the strap again, and sure enough, just as you say, it can be unclipped, Doh!
So do you use your minamilist shoes all the time now, and which ones are they?
EP - Started with some cheap aquashoes in Jun just to see if it was something I could do. Then bought some proper ones, Vivobarefoot Ultra's, very light. Slowly buillt length of runs up from 2-3miles and now upto 10miles on the road. Calfs and Achilles take the biggest hit at first, as with no heel elevation, they get stretched further. My one concern is whether doing my first mara in them and trying to Pb, maybe a bit optimistic.