Wow Arnold, that 504 and S-50 Stuart combo is the Bee's Knees of a deuce set-up. Heck, I've seen the S-50 alone go for more than you paid for the entire haul! What a wonderful bargain of a bunch of really fine equipment. You will grow to truly love that 504 boiler, if you don't already, and will find that there is very little in our model world that it won't power perfectly!!!
BTW, that other engine looks extra nice too!
Well done that ;c)