humm spring breakage is not very common in less you are IJ
and IJ cams are freaking huge compared to my setup
most cause of springs breaking is bind/heat/high rpm/ really long duration/shimmed properly and guides that or factory defect that and with high rpm a valve will float
check this vid out might have to use fire fox thou
as for no2 it is wet kit with per spool added on so I can choose between full runs with my msd digital window switch or run it as spooler with flick of toggle switch
http://www.youtube.com/watch?v=_REQ1PUM0rY
and good valve would be good thing to run as well with high rpm