I've got two of the small GRS locos, the cabbed Hunslet and the Kerr Stuart. Both are the earlier versions where the body was in kit form and fitted the LGB Otto chassis. They've both been converted to battery RC and they're some of my favourite locos. However, their pulling power isn't particularly impressive, but there again, probably much as you would expect in real life from locos of this size.
I understand that the bodies are now supplied as a single moulding with a few detailing parts to add. I'm not sure if these can still be made to fit the Otto chassis or whether GRS have done this to make sure that you also buy their chassis kit?
The biggest problem with these early kits was the standard of the instructions which left a LOT to be desired (and that's a massive understatement). I bought my Kerr Stuart second hand and un-built. It looked as if the original buyer had opened the box, looked at the instructions and promptly shut the box again for good.

I had the advantage that I had already built the Hunslet (eventually), so I had a good idea of where everything went. The advantage of the later, one piece body, is that you don't have to decipher how it all fits together.
BTW if anyone still has an unmade body kit for the Kerr Stuart, Hunslet, or Peckett that they've shut in the box having looked at the rubbish instructions and if you're interested in selling it, please let me know via PM. I have an Otto chassis ready to go.
