Actually for overall measurements there's not much delta between makes in terms of length. I've compared FX, TE2, and RT and they're very close on the shins - all about 15" (RT is 15" exact when I just measured mine).
Until someone creates a good tutorial (hint) on adding a shim lengthwise, or else better someone creates new shin molds that are an inch or two longer, what we have is what we have.