Many thanks Dave.
Yes, not pretty locomotives but like the Stanier Mogul, they would have been much more pleasing on the eye with a full width tender.
The clips sound like a good idea, but on my model I used 0.7mm NS rod so it's quite robust. Also as the ends of the pipes are orientated horizontally, not vertically as rhe original cast pipes were, they are snug under the bottom of the steps, so not too vulnerable to snagging. I think, like you, if I clipped them I'd forget at some time! On the JLTRT kit, I believe the steps are located on the chassis so the pipes can be soldered to the steps. Which remindes me, I must dirty the pipes.
Cheers,
Peter