I did not mess with the compression release. I did alter it for an EI. It starts easy and I did pick up some power. 6200 with a 20x8. Pretty weak but maybe useable. I sounds like an old Maytag washing machine when it is idling. I'll cut off the extra metal later. I made a ring that fit over the snout and cut six grooves to fit over the reinforcing webs. That ring is to secure the sensor bracket. The ring on the prop hub that holds the magnent rotates to set the timing and is secured wiht set screws. This system takes all the guess work out of where the magnent goes. I really like this sytem. I modeled it after one Ralph Cunningham did. His work is so neat and professional looking. I wish there was a site I could go to study his conversions.