I built a rudimentary but accurately sized 3d drawing just to see how it would look in a 1590a: http://www.3dvieweronline.com/share/HyYG21FBOhrwe8i/HyYG21FBOhrwe8i. You're right, it is a little long but I'm going to cut out the inner screw posts to slide it in. Still plenty of room for wiring and all that. Think it'll look pretty great. I'll be sure to send a pic of the finished product.