Since I do not own any tools or materials to fabricate mounting rings, it would be cheaper just to buy them. If you are interested in helping out please let me know. Thanks.
For the money you'll probably spend on shipping them, you can easily go to a pwn shop, Menards, HomeDepot, etc and get some cheap tools to get the job done. I picked a router up off Ebay for $13 3 years ago and it still works perfectly to this day.
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