Building the 9405 wire harness for the Boeing 717 I learned a little trick about soldering things. Aviation rarely uses a solder iron, we used heat guns and these [link=http://www.google.com/search?rlz=1C1CHFX_enUS401US401&sourceid=chrome&ie =UTF-8&q=solder+sleeves#q=solder+sleeves&hl=en&safe=off &rlz=1C1CHFX_enUS401US401&prmd=ivns&source=univ&tb s=shop:1&tbo=u&ei=u1wdTf6qN8GblgeWvcjTDA&sa=X&oi=p roduct_result_group&ct=title&resnum=8&ved=0CEQQrQQ wBw&biw=1280&bih=713&fp=ca05a7bb65e82229]Solder sleeves[/link].

Since my time spent with Boeing I have used nothing else for most connections.They really are a wonderful invention.