Bob Blarney Posted December 1, 2015 Share #1 Posted December 1, 2015 Hello, here's a link to blocklayer.com, a website for various calculators and other things. I think you will find many of them useful. Blocklayer.com (Greg Tarrant) supports a chidrens foundation, so if you find this site useful please consider a donation. http://www.blocklayer.com/Scale-RuleEng.aspx sidiboot, mtaylor, Mahuna and 6 others 9 Quote Link to comment Share on other sites More sharing options...
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