I have been running a Pierce +2 extension on my G29, i love the way it feels compared to the finger rest mag pad and of course the extra two rounds.  My problem is that the follower keeps rotating and getting jammed in the bottom of the mag when it is fully loaded, this only happens about half the time.  Does anyone have any idea on how to correct the follower rotation.  Or should this just not be done, if I remember correctly it happened on my G20 mags as well.  I have tried with extra power springs with the same result.  Help please.

I bought some to fit my 21 and encountered the same problems...
They did not instill enough confidance for me to continue to use because every now and then they would go tits up.I tried and tried to make them work but they would not.
In the end I got rid of them.
Why,,,because before this add on,the mags where always  reliable ...
Now I live happy with just 13rnds of .45..