One of the cool features my dropouts allow me to feature is internal cable routing, whether it be Di2 wiring, (above) or a derailleur cable.
Ellis dropout brazed to a 953 chain stay.
Some folks might know this, but for those who don't, the minor end of a chain stay can vary in diameter from around 12mm to as much as 17mm. Above is a good example of the larger stay, which mates well with the wide tab on my Ellis dropouts. On smaller stays, I'll often cut the minor end of the stay back to give me some extra width for attaching the dropout.
Another of my pet peeves is dropouts on really small or large bikes that end up looking dog-legged. In other words, the tab of the dropout extends in some angle, say 70 degrees, and then the stays get attached at an angle like 60 degrees for a small frame. I'm sure that it's plenty strong, but it's just plain ugly. What the seat stay tabs on my dropouts allow me to do is to shape the dropout to match this angle. Below you can see examples of both a really small frame (Sydney's), which has a angle of 65 degrees, and Steve's frame, which is pretty large with an angle of 77 degrees.
This last feature is one that just happened kinda organically on one of the first bikes I built with the Ellis dropouts. I had a fairly large chunk of tab that I needed to finish down on the bottom of the chain stay when I realized, if I leave this a bit proud of the stay and then have Jason mask off the paint, it makes a nice landing spot for the rear axle with no chance of chipping the paint off the dropout or chain stay. Once again, the fact that these dropouts are stainless came in handy as well!
All the Ellis dropouts get this "sliver" polished and masked off to protect the rest of the paint.
That's all for now, my next post will discuss the lugs I prefer and why.