remove the 2 small screws at coupler shaft . remove shaft with coupler. remove screw holding coupler to shaft.turn shaft over and lift up spring placing spring on top of coupler in spring groove. reinstall screw and small plate. install coupler and shaft with 2 screws. now it works- no cutting-bendin-etc.
this same method may work on the 2 truck shay. i will let you know this sat. when i receive one. bob.
the shay will not receive any modifications as it is a piece of junk.