Linn, thank you for the information. I contributed to the original fund drive, & perhaps I can help for the final one too. I building one of Tom Artzberger's 2 1/2 to 12 scale RGS-20 live steam locos, & my project is in almost the same status. Tender is done, chassis running on air, & boiler is complete. It will be a race to see which of us finishes first. I've often referred to the photos you've posted to understand the fit & mechanics of the Twenty. Thanks for all of them!