On the original big haulers, is there any after-market piece that will support the piston and the slide valve. Similar to the supporting piece on an LGB Mogul.
I have an old BBT conversion here and the action of the drive rods is too much for the piston and slide mechanism. It loosens and eventually comes out.
Do I make sense, or would a pic help?
jb
John
If the piston/slide rods are the original plastic ones, maybe you could build yer own:
http://www.largescalecentral.com/LSCForums/viewtopic.php?id=8500
see bottom of page. good luck, Vic 
John,
Barry or TOC?
That’s an interesting question.
Is that like Mac or PC?
Joe
Vic,
That’ll work.
Mebbe I could make one out of brass.
Joe:
Yeah, kinda. 
John,
I normally have magnesium bronze cross head guides as replacements. But my caster is having health problems and I don’t want to push him.
I will check to see how he is doing.
I may have another idea.
Barry - BBT