Haha, I do generally aim the sparks into the one bare corner of the workshop, but because it's only an 8' x 6' shed, the metal dust created just settles everywhere. Most of the grinding's done now and the weather's getting better so no need to mess up my precious shed again

After the champs I plan on cutting/grinding the teeth off that drum, getting another tooth made and going back to a 4-tooth drum. A wider drum would need a new chassis though, and having just spent ages getting this one done, that's something I'm not prepared to do yet. The current drum length will be fine anyway, I can just stick the two middle teeth together to make one thick tooth in the middle and two on the ends.