: Will someone 6'3 190lbs. fit into a Guillemot with the standard cockpit
: opening or should I enlarge it slightly to make an easier entry?

I'm 6-2, 200 lbs with size 12 feet.

You will find that you can slide into the Guillimot feet first no problem. You might find that you prefer a slightly larger cockpit though to make it easier or more comfortable. Some people have even enlarged the height of the cockpit slightly to make it easier to get into with slightly more foot room.

Try searching for Shawn Baker and his posts on his larger modified Guillimot.

pete czerpak
albany, NY