I received bolts and nuts from the McMaster fairy today, so naturally I tried to test-fit my fork mount onto the bike. It was /almost/ a resounding success. Firstly, I didn't clearance my bolt holes enough, so the bolts did not fit without some persuasion. I tried to hammer the bolts through, figuring I would be printing these pieces again. I ended up splitting the mount, indicating my layer adhesion could be better. I think these holes are printing undersized because the top of the hole is printed on support due to orientation. Next, I tried to fit the pieces onto the fork. Again, the inside diameter was a little too small. I think this is just due to some over extrusion, or just is the way 3d printers work, inside holes tend to be a little on the small side. This is one of the benefits of iterative design. I can just print up another at the cost of time and a little plastic.
Side note: Relative dimensioning in Openscad is amazing. I built this model a month ago, and I didn't remember what I would need to change to make the bolt holes bigger, like what else I would need to increase in size to keep my minimum clearances, and minimum sizes correct. However, I used relative dimensioning, and had to just chance a single variable for the bolt holes, and the rest of the model recalculated. Pretty slick.