Hi guys, Try as I might, I can't get a straight answer from anyone and Yonex does not reply to email inquiries. I'm currently playing in the SHB-91MX and they're wearing down, need to replace. Some folks have told me that the SHB-F1 is the next in the lineup but some have told me that this is a completely different shoe. I have flat and wide feet so something not so structured in the sole works best for me as well as soft siding. Can ANYONE help me on this? If the SHB-F1 is the right replacement, is color the only difference between the MX and the LTD? Thanks for any help. Cheers!