I have a proto 2000 BL-2 engine that I have had for a number of years. I purchased it brand new and ran it for a couple years. It started developing a clicking noise which appears to be a problem with the trucks. It has been sitting in its box for a few years and i just took it out and started tinkering with it. I have been unable to fix the problem. This is apparently a common problem with first run BL-2 proto locos. Does anyone know what exactly this problem is and if it can be corrected?