Simple Adjustable Circle Cutting Jig For Trim Router

I make a circle jig for a router . Most wood routers will adapt to this jig no matter whether they will take only 1/4" or both 1/2 and 1/4" shank bits. This router jig is made from HMR (High moisture resistant) see detail on this link https://www.sinkwarehouse.com.au/blo...anity-cabinet/ and a variety of other small components detailed in the article and the video.
This woodworking jig is a great way for the the beginner woodworker to make easy circles for their projects.
hope this video can give inspired.
https://youtu.be/UYFXT7RRYxo

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Thanks Didpoolhall! We've added your Circle Cutting Jig to our Jigs category,
as well as to your builder page: Didpoolhall's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-circle-cutting-jig-35"> <img src="/uploads/226953/homemade-circle-cutting-jig-35.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-circle-cutting-jig-35">Circle Cutting Jig</a> <span> by <a href="https://www.homemadetools.net/builder/Didpoolhall">Didpoolhall</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/jig'>jig</a>, <a href='https://www.homemadetools.net/tag/circle-cutting'>circle cutting</a> </div> </div> </div> </div>
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Anyone have a good idea for a one or few use hole saw around 100mm diameter to go through hollow brick (the type with lots of small holes) 380mm thick? I was thinking brazing some carbide inserts on a length of pipe might work ok for the few use level. Certainly cheaper than a commercial hole saw that big.

Very good idea and video!