I always wanted to scratch build a Y-wing because of all the little greebles and details and decided my skills had progressed where I should be able to do a decent job of it. I found a 2D blueprint online that I thought would help with the basic shape and scale but I have had to fine tune and correct it alot so far. You can see in the pics below I am starting with the basic shape and then layering on detail from there. Im using bits of wire for some of the tubing. The model is proving pretty tough since alot of the detail is between 1-3mm at most.