I'm planning to send mine in next week. Has anyone sent their GR4 in recently? If so, did you get the GR4 or GR5 back? I really want to get GR4 back instead of the newer GR5 because I know for sure that the GR4 fits perfectly for me and I loved the comfort. Also, I did go down half a size to 10 on the GR4. For those of you who have worn both, did you go back up to 10.5 for the GR5? Thanks in advance. Loved the GR4 and mainly purchased them due to the reviews from this board!