Hi Paul Thanks for replying to my post and thanks to all others for replying too. I think building one sounds like a good idea (especially considering the price of the Renner). Not having had any experience drilling a set of hammers (or building tools for that matter), I'm not sure what features would be important. I'll take a look at my collection of back issues of PTG journals for the article you referred to. Would you be willing or able to share more info (and picture) on your homemade jig? Thanks Bill Costanzo Rochester NY
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