@Hobgoblin mentioned a guy on B&B who got a brass handle center punch at Harbor Freight Tools and changed it into a razor handle. I thought that sounded great, so, I did it too. The punch costs $2.99 plus tax. I didn't have the 10-32 tap, so while I was at Harbor Freight, I picked up a 40 piece set for $15.99. I removed the guts and drilled it out to accept a 10-32 tap. The handle has a very nice feel. This is the handle with a Gillette Old Type. Here is the handle on a Utopia head. Middle section removed to make a travel handle.
I got out the MAAS metal polish and polished up the handle. Here it is on my Gillette Old Type next to the ball end handle. MAAS is pretty good.
Nice work! How is the weight compared to the original handle? I like the added length, I have large hands so I think that mod would be an ergonomic improvement for me personally.