Just curious as everyone seems to be recommending Dynatwist induction kits (plus a couple of others ), if anyone had ever tried the following induction kits and what the results were like:
http://www.pipercross.net/vis_product.asp
http://www.pipercross.net/viper_product.asp
http://www.knfilters.com/kits.htm
Cuprablue
http://www.pipercross.net/vis_product.asp
http://www.pipercross.net/viper_product.asp
http://www.knfilters.com/kits.htm
Cuprablue