Valve pocket/bowl hog tools....

Brian can you explain what you mean by "make your own" ?

I have knockoff dremel tool, but attachments are friggin pricy. I've checked walmart and limited supply there. Suggestions?

Heres some of what I'm using

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Good quality carbide burrs run about $40 each but will last a long time on cast iron if you don't overheat them and chatter them.