Be mindful of “S” curves with body mounts, especially with longer equipment. You’ve got a little more side-to-side play with the 830 (G-scale) couplers as opposed to the 820 (#1 scale) couplers I use, but it’s just something to keep in mind if you’re running modern mainline 1:29 (aka “really friggin’ long”) stuff. Where you can, use #6 switches for your passing sidings.
As others have mentioned, the disadvantage of the #830 draft gear is that it’s pretty wide, and sometimes you’ll have wheels that rub against the sides on tighter curves. In most cases, you can grind away what gets in the way. You’ll be surprised as to how little of the draft gear actually has to stay intact for it to work. You could go to the shorter draft gear, but I’ve never been a fan of their limited side-to-side play. Again, it’s probably exacerbated in my case by using the smaller couplers, but still. When you can use the longer draft gear, do.
Later,
K