What has to be switched, fromE 2 to Hogue wrap around grips?

I went to hogue g10 grips.

What pistol? Most only require screws to attach the conventional grip panels to the grip frame. Some, like the P227, require an adapter, since the screw posts are not present.

I replaced E2's with G10's on my P226 and P229, along with the Hogue screws. Screws do not come with the grips and must be ordered separately.

Sign 229R DAK.

You just need to buy screws.
https://www.topgunsupply.com/g...ory/grip-screws.html

Are screws for grips all compatable? I know German are 4 mm fine, USA are 3/16 am I correct? Will they interchange?

Well changed grip to hogue finger grips, everything seems to operate as advertised, According to Sig and others, just needed grip screws. I did not like the feel of the E2's. Thanks for imput.