May be a silly question but what is the difference in pot life and working time? Also just another general question, do you let the previous layer completely cure then add the next layer? Or is the second layer applied almost immediately after. For the linear how exactly would it work, just don't overlap on the same layer (if it needs to cure before applying the next layer)? Also for vacuum bagging is the primary purpose to get out the excess resin for weight purposes or strength?