I bought my PSC SP T-28 in 1986. As originally imported it was famous or infamous for the wheel gauge being a little narrow for O gauge (but easily corrected). This also made it a desirable steam loco for conversion to P48 gauge. If you are looking for a small loco to use on sharp curves, a 2-6-0 or 2-8-0 would be a better choice. The four wheel lead truck and long driver wheel base on this loco has a hard time with 48" radii.
Charlie