A well-designed site (easy to navigate through), full of good stuff for us piping nuts:
http://www.hmhinc.com/techpapers/designtip/index.html
If you spend any amount of time there you'll see that these people are not only in the business of selling stuff, they provide solid info. Reminds me of the days when manufacturers used to provide free catalogs and design guides back before everyone went computer-crazy.
Paul
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