winisd accurate?

[nYc.kablamO 10+ year member]

I was just comparing some of moe lesters sticky box plans to calculations winisd gave me using the same box plans. Winisd was giving me different port lengths than moe used, although it was only a couple of inches at most. Im not questioning moes skill, just wondering about winisd accuracy since its what im using to build a 4.5 cube box tuned to 32. It tells me (2) 6 inch round ports should be 29.25 inches long each. Is that correct?

Also, would I get a flatter response if I were to bring it down to 4 cubes same tune?

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