sorry Danny can't help with that info off the top of my head but i can tell you where to find all the info you need

go to the texel site below and download and save the zip files called "complete list with details" and "complete descriptions"

then you will have pretty much all the data you need to know how big your sails are and which sails are smaller

the g-cat 5.7 seems to be on line 117

http://www.watersportverbond.nl/wed...sid=6&cid=1039&mid=&mnu=1638