Hi,
As has been mentioned the air pumps where needed for the doors, As far as I am aware there isn't one in 7mm. I have the Dave Bradwell kit on the pile to do and I have seen the Dave alexander one and it looks quite tasty.
One small point about the weathering though: I don't thing that I have ever seen air pumps like that, they are almost invariably coated heavily in oil, likewise the motion. I think it's all a bit 'flat' as it is at the moment but perhaps that's just me?
AJC, I know what you mean about the pumps and the motion, however the pictures that I was given by the customer to work too didn't have the heavy oil coating which I could only guess was quite soon after it received the pumps as a bit of research on flickr showed the shiny oil residue around the pumps on this particular loco.
Out of interest, what do the 'conversions' mentioned involve?
Jordan, the O1 was a case of removing and relocating a handrail higher up the firebox side to enable the pumps to be added to the side. Two tanks where added, one on each underside of the footplate with pipework running towards the inside of the chassis frames, Extra pipes running under the handrail to the smokebox.
The 9F was much the same apart from the extra work of having to cut some of the footplate on the side.
Cheers
Simon