If you go to the yahoo 120 site and check out Jolons  photos (sory dont now whitch one) he has detaled the under side of a track gang UK pipes and all.

photos 31-32

SO the Uk and the IA have similar under sides

No other than a similar overall length, the UK and IA are very different designs.

Then why was it said to look on NZ120 to see the underside of a Uk, when someone else asked for detailing of the underside of an IA.

So to try and answer the original questions...

As far as I'm aware there is only a single air reservoir on an IA, this on the opposite side to the brake wheel. I have a few IA photos, but no detail photos so can't help much more here.

As for brake wheels I used an HO scale one on the IC wagon, it's a little over scale but doesn't look to bad.

I'm looking at getting some photo etching done for the IC which will include brake wheels, but nothing is concrete with this as yet, so don't go holding your breath.

And I thort I was being helpfull, If I had hair I'd poot it down to a blond moment, sory for my latest unthoght replie.

BIG FOOT for the IA biulders, if you do similar cut out you can drop it by 1 mm, not much I no but if you have a 9'6" on a IA behind a loco it makes all the diferance. Hope this helps.

If an IC (60')is just a longer wagon than an IA(50'), but have similar details you could check NZMRG Journal Dec 2002 for photos of IC's, if that helps.

Russell

Not sure if this helps but heres a shot of IA 1239 with a load of empty 'goldies' at Palmerston. 13/05/10.

I'm going to guess thats a brake cyclinder, how big would that be