OK Heres what I have learned or heard about the 2 epoxy blanks . Xtruded is the best for not soaking uo water BUT has a problem with expansion from heat. There is a company glassing with vents in the deck for this which is great if they work. Xtruded is also denser maybe harder to shape but also maybe stronger. EPS is lighter ? easier to work with but from what I have read on here it only has a water resistance comparable to urathane board blanks and that is the claim of the new EDRO foam the older “Dow” type sucks water even worse. However the EPS DOES NOT ? have expansion problems?? I sometimes leave my board in the car while I work (with the windows down some) but it still gets hot , this is a consideration. How bad is the Xtruded expansion problem? How water resistant is the new EDRO foam? Which one to choose seems to be the thing . Is there anymore things to consider? THANKS ALOHA To all