Well, for my first thread on the forum, I'm going to post my progress on making a DDm45, a narrow gauge SD45 built for the Vitoria A Minas railway in brazil. So far my plan is to use Athearn DD40 trucks grafted onto the SD45's frame, but the difficulty lies in narrowing the trucks to take HOn3 gauge. I have a few SD45's I already bought to use for the modification, but my Athearn trucks aren't here yet. So far I've been working on the shells themselves to get them prepared. They lack paint for the most part, but they're ready to take the extra size trucks (the addition of the porches involved grafting on ones from SD40-2's) and the details are all added, as well as lighting. I'm also hoping to do these with DCC, as the layout I'm designing for this needs it. My question lies with anyone here having experience seriously modifying Athearn trucks - could I feasably narrow them down somehow? Is it possible in any way or am I just nuts for trying? I'm beginning to think that the gearbox itself that is contained in the truck is just not something I can narrow, so I may have to kitbash something entirely new from scratch instead...given that, what would be the best way to go about it? Upsize an N-scale truck to HO? Somehow modify MDC HOn3 shay trucks to be used? I'm thinking of doing that for the BB trucks in the other locomotives used on that railway, but how to do even that is also a bit beyond me. If it's that nuts, I don't even want to contemplate how hard it'll be to make some BB40-8's or BB45-2's...or a BB40T-2 but I'm going to go for it anyway - as far as I know, noone has done it before! Anyway, comments or knowledge/help is greatly appreciated.