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<blockquote data-quote="helotaxi" data-source="post: 2086725" data-attributes="member: 550915">I usually do it before.&nbsp; I have a few pieces of sacrificial wood around and a big roll of double sided tape.&nbsp; Tape the baffle to the sacrificial piece drill into both for the pivot pin and then clamp the whole thing to something that isn&#039;t going anywhere.&nbsp; I use the saw table.&nbsp; End result it that the center piece is supported when you&#039;ve cut all the way through and it doesn&#039;t spin.&nbsp; No danger of cutting into the baffle and no little nub left either.Another thing I&#039;ve found is that a striaght cut bit is the worst POS ever for use with a circle jig.&nbsp; I tried one for one cut instead of the spiral up-cut bit that I normally use because the spiral bit I had at the time had been dulled from use.&nbsp; The noise from the straight cut bit was deafening (and yes it was a brand new carbide bit) and the quality of the cut was not what I was used to.&nbsp; I promptly took the straight cut bit out of the router, threw it in a drawer and went to HD to get another spiral bit.&nbsp; The spiral bit clears the chips/dust out of the cut as you go and doesn&#039;t take as big a bite out of the wood making for less strain on the bit and a cleaner cut.&nbsp; Cutting 3/4&quot; MDF or plywood in a single pass is a simple affair.&nbsp; Cutting rings and recesses with only an 1/8&quot; thickness is simple.&nbsp; Bottom line is that I&#039;ll never go back to a straight cut bit.</blockquote>

[QUOTE="helotaxi, post: 2086725, member: 550915"] I usually do it before. I have a few pieces of sacrificial wood around and a big roll of double sided tape. Tape the baffle to the sacrificial piece drill into both for the pivot pin and then clamp the whole thing to something that isn't going anywhere. I use the saw table. End result it that the center piece is supported when you've cut all the way through and it doesn't spin. No danger of cutting into the baffle and no little nub left either. Another thing I've found is that a striaght cut bit is the worst POS ever for use with a circle jig. I tried one for one cut instead of the spiral up-cut bit that I normally use because the spiral bit I had at the time had been dulled from use. The noise from the straight cut bit was deafening (and yes it was a brand new carbide bit) and the quality of the cut was not what I was used to. I promptly took the straight cut bit out of the router, threw it in a drawer and went to HD to get another spiral bit. The spiral bit clears the chips/dust out of the cut as you go and doesn't take as big a bite out of the wood making for less strain on the bit and a cleaner cut. Cutting 3/4" MDF or plywood in a single pass is a simple affair. Cutting rings and recesses with only an 1/8" thickness is simple. Bottom line is that I'll never go back to a straight cut bit. [/QUOTE]

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