Pellet Stove Cleaning Brush

I own a pellet stove that has a heat exchanger with extra long cast iron “fingers” (see photo). This needs to be cleaned regularly. The challenge is, a standard brush attachment's bristles are too short to do this properly.  This vacuum attachment solves that problem. It fits a Loveless ash vacuum but should also fit other ash vacuums as the hose size is pretty standard.  Print this in PETG for strength. 

The resulting print is designed to accept a length of bristles cut from a CNC dust shoe brush with 70 - 100mm bristles (choose whatever you need).  One of those is enough to make several brushes.  I used a small amount of urethane glue to attach the bristles (mist lightly with water first).   Be advised, that type of adhesive foams when curing.  A little goes a long way.