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I was thinking that this would produce a rough surface, thanks for confirming. 

PS, on a side note, really like that unique hammer.

Oldtool.... Thanks. So you like that hammer? Should I do a post on it? Think anyone would be interested?

I made a hammer very similar to that a few years back. Great opportunity for different heads. 

They certainly room for different interchangeable heads. Another neat thing is it's weight. Sort of like a dead blow mallet.

Should I do a post on it? Think anyone would be interested?
I'm thinking it would make a nice plane adjusting hammer. Put a pipe cap on one end for tapping the iron.

Oldtool...I did that! It works great but way too weighty and heavy for adjusting planes. However I did go and do this same concept with a small brass tee and it works great for a plane tapping hammer. I just went to get it and can't find it to show you. Guess I'll be making another one. 🙂