Bike Chain Guide

Got tired of my bike chain falling off when shifting into the small chainring in the front. Designed this parametric piece to attach on the lower seat tube (as seen in the photo), and stop the chain from falling off on the inside. You can customize to fit any height, seat tube diameter, and distance from the edge of the seat tube. You can also use any size screw/nut you have (within reason) using the clamp hole diameter setting. I used M3 and it is working fine, but M2, M4, M5, anything that fit