Thanks in2tech! If you're happy with your little layout it shouldn't matter. Mine is more permanent, but I'm finding all the mistakes that I made as I build it. The grades are too steep, there's really too much track, tunnels are annoying, and the trackwork is suspect at best. But I'm forging ahead with the problems and just chalking them up to learning. Who knows, if I ever build a second layout once this is "finished", at least I'll have a better idea of what not to do. I enjoy just building stuff, and this table is just that, a huge excuse to play! Okay.. so I took the wheels off the GMD-1 yesterday and re-gauged them all. First time around, I widened the gauge until there was no side to side play in the NMRA gauge. Ick. Yeah that doesn't work. The locomotive was choppy through the turnouts, catching on everything. So re-gauged again, this time with a little side to side give in the gauge. Aha! Now the GMD-1 runs nicely through the turnouts, and stalls less often. But still can't make it across some turnouts, especially at slow speeds. But I know what's wrong. First, I'm sorry for the quality of the pictures. They suck. So I started running the GMD-1 in the future mine tracks. Easier to take pictures and see what's going on. Up above, we see the GMD-1 has stalled. The rear truck is on the turnout's frog, so no electrical pickup there. But what of the front truck? It's clear and on rail that I know to be good! There!!!! See the fuel tank? it bottomed out on the rails. most frogs on the Atlas turnouts dip a bit below the level of the rails. So as the truck rolls over that frog, the fuel tank hits the rail. It doesn't help that the fuel tank is mounted ever so slightly crooked on the frame. Okay, so it's barely touching! why should this matter? This next photo shows the final straw... With the fuel tank bottomed out, the front truck lifts off the track. The rear wheel looks fine, but I guess the locomotive needs more than just one axle picking electrical contact. So yeah, if I run quickly through the turnout, it makes it across. But I can't run at yard speeds. I wasn't moving this loco at tie-by-tie speed. Re-gauging the wheels helped, but it still dies fairly often. Now here's my biggest problem... On the Rapido website, they have an exploded view of the GMD-1. The fuel tank is held on by a screw, and the only way to get to it to to completely disassemble the frame. I mean completely! I don't think I have a choice at this point. But I'm really apprehensive about doing this and ending up with broken bits or something the runs terribly. The idea of course would be to reseat that fuel tank so that it is perfectly level and give it every chance of not bottoming out on the rails. Any other ideas?