Calculators and stuff ! ! !

[barkwindjammer]

Well worth a bookmark, would be a good forum 'sticky' also ?
:idea:
http://www.blocklayer.com/Sitemap.aspx

 

[CHJ]

Thanks for the link.
Added to General Books and reference links Sticky

 

[gregmcateer]

Excellent - thanks for sharing

 

[MARK.B.]

Very useful site, thank you for sharing with us.