Hi! Regarding the armor. When we purchased the kit from Kevin Weir, version B features a different back plate, our kit actually came packed with both options. The version A back plate is the way it comes molded. Version B is an abs rectangle that you mount onto the armor. In addition the thermal detonator is built differently, the pipe remains unpainted, and the trim is different. So, basically, regardless of which version you decide to go with, Kevin has you covered.
Currently the flat boots are the most difficult to source, which is probably the reason why more folks are making version A rather than B. The ones featured in the CRL are by Gio, he made the heeled version in the CRL as well.