The metal Sprockets from Taigen will fit the HL plastic gear boxes. They are basicly asiatam copies. I have both and they fit the old HL plastic gearboxes. Here is the link to them at Artistic Hobbies. The cool thing is that you get metal idlers with bearings.
http://www.artistichobbies.com/prodd...prod=TAG120144
Last edited by MAUS45; 02-19-2015 at 12:30 PM.