Great rifles!

Mark, welcome to the site and thanks for showing that absolutely sweet little Rigby off to us.
I heartily second Mick's comments, especially the plea to keep it as it is - don't let anyone near that thing with a drill.
If you need optics there are plenty of rifles out there to slap a scope on. You're not likely to find another example of what you've shown us above.

I've lately been picking through a rack of things I've been meaning to clean and shoot, including the 7mm mauser that belonged to the grandfather of my oldest friend from childhood.
The stock on that Rigby has me itching to get it stocked and sighted properly.

So many rifles.
So little time.

--Tinker