I made these stems to help with fitting a new road bike. They let me try different stems until I found one that I liked.
I've included two models so far. One is 120mm, +-6 degrees and the other is 110mm, same rise/drop. I'll include more lengths (100, 90 and 75mm) shortly.
You'll need six M6 low-profile socket head cap screws to put it together.
I'd highly recommend using these for testing various stems, only. Don't actually ride on the road with one of them as they are not tough and their strength is only as good as each layer bond. If the stem fails while riding, it'd be lights out.
I printed this with full supports, 200C extruder, 60/50C bed. I printed two version, one laying down and one standing upright. The latter turned out much better but aligns the print rings in the direction of stress which is probably the weaker direction.