Hi Wayne,
Don't mind you dragging this up at all, I haven't posted on here much as I have been posting workbench stuff on my layout thread which is a bit lazy really, but I haven't really done much to be honest.
Glad you liked the article, I thought it was worth sharing as I like to see bufferbeam pipework on loco's.
Best advise would be to give it a go on a couple of loco's, Some of mine have been done for a few years now and not lost a pipe though a class 47 lost it's vac pipe and a class 37 lost an air pipe. The class 37s air pipe came off because it got caught in the Kadee and I was a bit rough trying to sort it out. The vac pipe just came off so could have been a case of not enough glue, not that you need much. It may have been that the surface I was gluing too wasn't flat and it didn't take hold very well. Other than that I would say give it a go. I have noticed it's harder to glue the Hornby pipework than the Bachmann maybe its a different plastic.
Hope that helps, cheers Peter.