Just finished this fella on the weekend...5'10 x 21 x 3 double ender...bottom is double concave to spiral vee which runs about 2/8 of an inch deep....did some plywood fins templated of the MR-X...just need to do the other set to make it a quad glass it and I am away...added up all the costs and because I got the blanks on special this board will cost less than $150 start to finish....