i had it go out twice now and finally found out why. the shaft on the accel is an 1/8 inch longer then the stock opti. the cam was puting the pressure on it and causing the rotor button to heat up against the cap and bust. i will not buy one again

 

I've been running one for several thousand miles and 7K+ rpm (albeit connected to a Delteq). Hasn't blown up yet.

 

That is a pretty sizable difference.

 

I noticed that too when I was trying to install one on a buddies car. I could barely get the opti housing to touch the timming cover. Sent it back quick.