i'm also on the way of building a copy of Ben Beneke's BR23. at the moment i try to compose the list of parts and didn't build anything yet.
i have found pdf building instruction, mlcad file and part list as well on Ben's brickshelf page (www.brickshelf.com/cgi-bin/gallery.cgi?f=143248).
however there are some difficulties to me.
maybe we can prepare Brickstore XML file together like one user did in Barman's Lego Power Functions-Controlled Train Switch (www.eurobricks.com/forum/index.php?showtopic=62344&st=15) topic.
> Wondering what wheels are you using if not the BBB XL ones?
after learning the information from br23.pdf (p. 65) and mlcad file it seems to me that BBB (large not XL of course) wheels can be replaced by:
85489b Red Train Wheel RC Train (Flanged)
85489a Red Train Wheel RC Train (Blind)
moreover those parts can be easy equipted by x37 Rubber Belt.
ps. i have suggestion to moderators to combine this topic with MOD+ARTICLE: Motorizing Ben Beneke’s BR23 (http://www.eurobricks.com/forum/index.php?showtopic=48532).