agree with all the comments above, device wise I'd rather keep faith in people having a quick look at their files, then starting an approved device system.
Rule of thumb if your vmax is more than 1 knot above your 100m speed, there could be an issue, please double check your file or send it to someone with analysis software. (me ; decrepit

LOL )
GPS speed surfing has a foil page now, and they are not immune to bad results posts. The third fastest guy (36knts) has a 100m speed of 32, and on a foilX board with a 1000 wing and 330 fuselage, very unlikely !

Unlike Ka72 you can't download the file to check it.
www.gps-foilsurfing.com/?mnu=rankingsthey have a green and yellow colour code for approved devices.
Thanks everyone for contributing to windfoiling worldwide, hopefully it keeps growing and any suggestions of improvements are welcome !