Just out of curiosity, what model N-frame is it?

I dislike the N-frame round butt configuration. I owned a 25-5 that someone had converted, and I also have a model 25 Mountain Gun. With the round butts, I need a much larger grip to handle the gun, and when I bring it onto target the larger grips consistently cause the guns to be aimed slightly to the right. With square butts, and a nice frame-following grip, the extra grip at the bottom rear of the butt fills my hand and keeps my fingers from rubbing on the trigger guard while still maintaining a high hold on the grip. That is what I dislike most about round butt grips. The ones that are large enough to feel decent push your grip down below the trigger guard.

That being said, the round-butt conversion had been done fairly well on the 25-5 I had. Good luck with your project.

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Hastings