I'm wanting to replace grips on my Springfield loaded park. The original grips are too thick. I've got some slim grips from Fusion that are too thin, so i'm looking for something just right.

Was considering the Ergo square bottoms as i've also got the slim smith and alexander mag well/arched main spring housing. Would the Ergo's marry up with the mag well? Are the Ergo's thinner than standard Springfield grips?

thanks

No.  Maybe try Chip McCormick thin grips.