ORIGINAL: w8ye
Those Dingle Berry bottle brush type sanders shouldn't be used on a two stroke with ports in the sleeve. You will ruin the sleeve.
This is a "Flexihone".
Same here i will say a bad idea in model engine when you are using flexihone or brake cylinder hone. As all here wrote as i did: use 400-600 wet/dry sandpaper do deglaze the cylinderwall.