Good News re the Boost A Spark
if you visit KB's site and do some digging you will find they are now only offered w an output of 17.5 volts.
this is a problem as the IGN1A/Mercury Marine/AEM Smartcoils (all the same except for the badging) have an internal V clamp at 17.
prior Boost A Sparks (BAS) had an adj dial zero to 50% V increase.
apparently all the "modern" coils work great at 17.5 so KB is phasing the adj out... also they said people were bypassing the dial to get more V.
however, the CTS-V can't handle 17.5 volts and is a big seller so they do have the dial/adj item.
KB does not have dealers so you have to call them.
the sales line is 909-941-6646 and the tech line is 909-941-0985 closed at noon for an hour Ca time.
ask for Mike who can be reached on either line and order the BAS for the CTS-V.
here's a link to the BAS page
i run my IGN 1A coils at 16 V and around 4 mS dwell.