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Here is the latest Luthier Tips du Jour video. In this video I talk about how to fix a crack in a guitar back. This video, as well as all my other videos, are available via my website, https://lutherieacademy.com/videos , or on YouTube. Don't forget to subscribe to the O'Brien Guitars YouTube channel if you want to get the latest Luthier Tips du Jour videos when they are released.
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Nice Video Robbie,
Using the UHMW plastic for the jig is a nice touch.

I posted on the video about the tool. I first saw it in Don Teeter's book on guitar repair I bought in 1980 or 1981 (I think). I built the tool and I use it to this day. I also asked Robbie where I could get one of those handy drills. I can think of some good uses for one at my bench.

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"Act your age, not your shoe size" - Prince

Pin vise. I have a couple I use all the time and yes they are handy for small hole drilling or jobs where a hand drill is awkward and an electric is overkill.

The ones with a chuck are more versatile but sometimes don't grip the smallest wire drills. The other option has a collet or collets (double ended w/two size collets). They are better for drill shanks fit to the range of the collet.

Amazon lists lots of them - https://www.amazon.com/s?k=pin%2Bvise&channelId=53&clpRedir=Y&mfadid=adm&plpRedirect=mhFallback&tag=admarketus-20&ref=pd_sl_a71c226e8a96bfdb7ae5bc6d1f30e9e88d9e4e3436d7bfb941a95d0a

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Brian R, Wood Mechanic
N8ZED

I have some tools that are similar, but for some reason I thought Robbie was using a fancier one that spun on the tools axis. Thanks for the link, looks I have some research to do before purchasing.

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"Act your age, not your shoe size" - Prince

I have built several of those in the past. I found that instead of drilling the hole for the string, you can actually force the string through the crack without drilling. I take a pair of pliers, and grip the string about 1/4" from the end and force it through. Then I pull that end out through the sound hole
I cut the ball end off the other end of the guitar string and thread it through the tuner shaft, turn it a few rounds, leaving enough string to have the cleat outside the sound hole. Then I add the glue to the cleat.