Good morning Fred,
I never would have thought of your tip, but it works the best yet on my quick testing. I just happen to have that type of dental brush on hand. The brand name is GUM, comes with a blue and white striped handle and is about 2 3/4" long. It works by just slowly pushing it between the jaws of the couplers and twisting slightly. Be careful when the uncoupling is completed and you are removing the brush. One of the couplers can slightly grab the brush and could cause a derailment if you are too hasty in the brush removal. The 2 3/4" length made it a little tricky between two 26' boxcars but I found that the clear tube that covers the brush (probably sanitary reasons) can be forced onto the handle end, now making the "tool" about 4" long. I'm guessing the brush will wear with use, requiring a periodic change to a fresh one. I can't wait to tell my dentist that his recommended brush for tooth maintenance also has another use.
I never would have thought of your tip, but it works the best yet on my quick testing. I just happen to have that type of dental brush on hand. The brand name is GUM, comes with a blue and white striped handle and is about 2 3/4" long. It works by just slowly pushing it between the jaws of the couplers and twisting slightly. Be careful when the uncoupling is completed and you are removing the brush. One of the couplers can slightly grab the brush and could cause a derailment if you are too hasty in the brush removal. The 2 3/4" length made it a little tricky between two 26' boxcars but I found that the clear tube that covers the brush (probably sanitary reasons) can be forced onto the handle end, now making the "tool" about 4" long. I'm guessing the brush will wear with use, requiring a periodic change to a fresh one. I can't wait to tell my dentist that his recommended brush for tooth maintenance also has another use.