I bought a nice little Mantua Shifter which runs very nicely. The only problem is that it's got Kadee couplers. I have nothing against them, and someday I might convert everything, but at the moment everything else has the standard plastic couplers, and I 'd like to convert the Mantua. Problem is, the couplers aren't attached to the truck, but to the bed of the loco (front coupler) and tender. That works for KD couplers, as they have the swivel built in, but the others don't - they depend on the truck for the swivel. And the front Kaydee coupler is so low that the horn hits the track at crossings and turnouts. Any solutions?