Thanks Pieterjan for yr suggestion, actually the photos of Sjoerd was unclear

Find below the corrected list:
1 42/USA 250 GUCK, LARS Guck A3/Glaser/Hall
2 03/AUS 1 ASHBY, GLENN Flyer MK2/Ashby/Fiberfoam
3 09/NED 250 BOOTH, MITCH Vectorworks XJ/Glaser/???
4 01/AUS 2 ANDERSON, SCOTTY Flyer MK2/Ashby/Fiberfoam
5 82/NZL 232 PHILPOTT, MURRAY Flyer MK2/Ashby/Fiberfoam
7 NONE/USA 69 MELVIN, PETE Nacra A3/Glaser/Hall
7 51/NED 3 HOEKSTRA, SJOERD Tool/Brewin/Saarberg
8 05/GER 12 BEIKE, DONALD Flyer MK2/Landenberger/Fiberfoam
9 24/SUI 202 DU BOIS, LUC Scheurer G5/Ashby/???
10 14/ITA 2 CALABRIA, EUGENIO Flyer MK2/Ullman/Fiberfoam
11 93/USA 198 STRUBLE, MATT Flyer MK1/Goodall/???
12 76/USA 269 OGLETREE, CHARLIE VMI XJ/Glaser/???
13 04/USA 232 ATKINS, CHAD (sorry no photos)
14 53/USA 110 KINDER, PHILIP Flyer MK2/???/???
15 57/AUS 308 LANDENBERGER, ANDREW Marstrom M5/Landenberger/Marstrom

I hope to complete the blank spaces with yr help.
Then summarizing:

Platforms:
no 6 Flyer MK2, no 2 A3, no 2 XJ, no 1 Tool, no 1 Scheurer G5, no 1 Marstrom, no 1 Flyer MK1 (no 1 unknown)

Sails:
no 4 Ashby, no 4 Glaser, no 2 Landenberger, no 1 Ullman, no 1 Goodall, no 1 Brewin (no 2 unknown)

Masts:
no 5 Fiberfoam, no 2 Hall, no 1 Saarberg, no 1 Marstrom (no 6 unknown)

Please keep sending yr corrections