sabashimon:

There's a thread here on making the thumb safety single-sided instead of ambi. (I think it's here....) Just remove the safety lever and toss it aside. That'll leave a couple of square cutouts in the plastic frame - I'm not sure what the fix is there, if any.

Alternatively, there are some videos around for installing the Apex sear into the sear block. The thumb safety is part of the sear block - pop it out and toss the thumb safety lever. Then put the block back into the grip frame....

The only real issue is having the eighth-inch roll pin punch (DO NOT use a standard punch!), and not managing to lose the ejector or pop the sear loose.

In short, nothing to it....

Regards,

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Stu.