Re: RFD garretts

Greg and Doug,
The 42" (Cape Gauge) Garratts were all inside frame. There is no way that you could move the drivers in 3" on each side without totally reconstructing the frames. Not very practical, I'm afraid!
I didn't see the show, but if you saw an outside frame Garratt, it was one of the 2 foot gauge NGG 15 or 16 class Garrats that ran on the 2 foot gauge lines along the east coast. The best known (and still operating) line runs out of Port Elizabeth, but there were quite a number in Natal. These engines would be too small to bother converting to 3 foot gauge, even if it could be done. An earlier NGG 13 class is in Texas on a private estate railway.
As an aside, the East African 59th class Garratts, which were the most powerful narrow gauge Garratts ever built (over 83,000 lbs TE) were built for meter gauge but were designed for possible conversion to 42" gauge. This was never done. One of these is preserved at the Nairobi railway museum and has recently been restored to service for special trips.
Michael Allen