Smithsonian Engine Kit Replacement Crankshaft

This is my own design based off of the crankshaft of the Smithsonian Motor-Works Model Engine. I was running my engine with a drill at around 1500 rpm and I dropped a valve and half of the crank exploded, this is the replacement. I am in the middle of printing it right now so improvements will come.

Printed Horizontally with 100% infill and 10% support material on an Anet A8 placed at a 45 degree angle on the print bed so it prints with and against the grain.

Not me but same engine
https://www.youtube.com/watch?v=XQVciy5ObMg