I have been working on this for 2 hours and can not get this coupler installed on this MTH HO Scale 4-8-2 Mohawk.  I wanted to install a Kadee #148 but the "whiskers" on it do not work in the way MTH designed the pilot.  it's a rather awful design.   So i'm trying to use the plastic coupler it came with for the pilot but it still wont go in.  Any tips or suggestions?   (Other than buying a DIFFERENT manufactured model of this please!)

Ken L.