Important! Sorry guys but there is design flaw with my design created by the intended print orientation. I was hoping if I printed them solid that the layer adhesion would be strong enough but while removing the hoop I broke a tip (I leveraged on the tip too much with the hoop). It split through the layer lines like wood splits with the grain.
As a solution to prevent the others from breaking I installed a 1-5/8 inch long grabber screw.
I just pre-drilled and countersunk the holes rather than re-printing them but if you haven’t printed yours yet here are the files with the new holes:
Reinforcing Connector w Grabber Screw - Left Tip.stl (1.8 MB)
Reinforcing Connector w Grabber Screw - Left Center.stl (1003.2 KB)
Reinforcing Connector w Grabber Screw - Right Center.stl (1003.3 KB)
Reinforcing Connector w Grabber Screw - Right Tip.stl (1.8 MB)
This was the cheapest fix since grabber screws are pretty cheap.
Another option is to use longer bolts into the standoffs (M3 x 30mm instead of 12mm) and make the counter bore more shallow. This requires re-printing the tips (if you have printed them already) and purchasing 16 screws (80 cents each at my local hardware store adds up fast when you buy 16 of them).
Here are the files for that option:
Reinforcing Connector w 30mm Bolts - Left Tip.stl (1.7 MB)
Reinforcing Connector w 30mm Bolts - Left Center.stl (975.0 KB)
Reinforcing Connector w 30mm Bolts - Right Center.stl (975.1 KB)
Reinforcing Connector w 30mm Bolts - Right Tip.stl (1.7 MB)