Bicycle chain guide

EDIT:
=== I made stl file for guide but mounting on the other side of the seat tube- on the side of the rear wheel. ===
So the .stl files are -
declan2.stl guide for the front of the seat tube
declan3.stl guide for the back of the seat tube

An easy to print and use, Bicycle Chain Guide build specially for my bike which is 1x9 custom assembled old Bianchi.
You can use it too by modifying two main parameters:
1. The angle of the seat post tube
2. The offset for the chain ring- the tunnel where the chain go inside.

It is hold by two plastic ties, and u can put a piece of rubber(inner tyre) between the guide and the seat post tube.

For seat tube with 29mm seat tube, and 46.5 offset for the chain whole.