Hi all,
I thought this would be a quick upgrade project!
I got a bargain diagram O33 Lima Siphon G at an exhibition last year. When I got home, I checked what GWR.org say on it - incorrect bogies - well that should be easy. Looking in the Siphon Bible by Jack Slinn, it could be one of four types with 9' Pressed Steel making up 75% of them. Many of them were converted to other types after WWII so watch out for that. O59 is easy - just add shell vents x11. M34 is shell vent
