Nice build! I built one in the '80s that I like, but alas, it did not survive. I have a couple of the old MPC kits in my garage, plus the Fine Molds kit, if I ever get around to building them. I even have two of the larger motorized kits sitting there as well.
Sweet! I want one! Too bad that today the only X-wing model on the market is Revell Easykit
Its' pricey, but Fine Molds makes a very nice 1/48 scale kit (and 1/72nd, too):
http://www.hlj.com/product/fnmsw-09