Patrick, Not sure what your concern over the mounting plate is. I called inlinewarehouse.com and just told them the size (and width) of my skate. They were real cool about it and seemed really knowledgeable. My other skates have a RedStar E-Frame and I could compare but I have no idea what size E-Frame I have. (if you could tell me I'll gladly check). On a side note, with my E-Frames I feel pitched forward but on the Vanguards I definitely feel more neutral. Many posts have stated this and I can atest to it. Hope this helps