So readers know what Jay and I are talking about, let me post a Mike first. This is Berkshire only to the extent of the frame itself, which has had both ends replaced with Lost Wax Mike castings from Pearce/Stevenson.
I call it "blocked out" because it is a starting point - assembled in sort of a "short block" form. Boiler is one of the Lobaugh spinnings, but it was originally a Mike, not a Berk. I will measure the Berk boiler in a bit - might be a bit tricky, because I am not sure I have a bare Berk boiler laying around.
Drivers on this one are LocoWorks coined brass - really good PRR drivers from before he started plating the axles and pins. After the plating process, pressing the components together resulted in unusable dimensional excursions - drivers so pressed need inserts for axles and pins to again function. Rods are just junk, applied because they were at my fingertips. Stevenson has masters for clevised rods, matching the SP Mike. They are as good as CLW rods, in my (humble?) estimation.
