Hi Steve,
All I can say is when I started this lark at age 16, I joined my local club which was then the IWMES, and I was told not under any circumstances build a 3.5"g 'Tich' by very experienced fellow model engineers. Instead I was told, in fact directed, to build Don Young's 5"g Railmotor design as a first loco.
As I knew the 'words and music ' for 'Tich' almost off by heart, this was an initial disappointment, but I do not regret the sage advice I received all those years ago, and a 5"g Railmotor was started straightaway. It was so easy to fire and drive that my 2 daughters when quite young learnt to drive on it at the club track.
I do not apologise at all for my earlier post that most 3.5"g Tichs remain as ornaments, or not even finished as ebay proves.
LBSC's Juliet is a much better design and better proportioned re the boiler.
Cheers,
Julian