“CamPac” 3-D printed coupler boxes are now available for the USA Trains GE 44 Ton Loco. The boxes are body mounted and accept Kadee centerset couplers from the Kadee 907 kit.
See “USA Trains GE 44 Ton CamPac Install Guide”
If interested in obtaining 3-D printed boxes, visit Colin Camarillo’s website.
-Ted