I actually changed my mind from SBF to BBF after I purchased a TKO600 from Mike Forte. He sent me the new shortened shaft and walked me thru the process of changing it out, which was pretty easy, and he left me his cell number to contact him if I needed help in the middle of the swap. He did not bill me for the shorter shaft, but simply asked me to send the long one back to him, and included a prepaid UPS shipping lable for the return trip. Pretty good customer service if you ask me!