Point taken T6, sorry things have gotten a little heated.
If we can get back on topic I would also like an answer to a question you asked in regards to carbon build up in the "Groove" itself.
Have you experienced carbon build up in the slot on your slotted pistons Larry ?
I would speculate that the velocity of the gasses moving through the groove might prohibit the carbon from building up.
Any observations on this from your experience Automotivebreath ?