Steady yourself West,
I actually gently sanded the holes in the bridge on the GF 60. I repeat "Gently". Didn't seem to remove much material, more like removing finish & gunk from inside the holes. , I used the old pins as a sort of mandrell, cut little bits of sandpaper to fit the contour of the pins & gently, very gently, trued the inside diameter of the bridgepin holes to fit the pins. It didn't take much & it'd be very easy to go too far. Real easy to go to far.
I'd wrap the sandpaper tight around the pin, carefully insert it in the hole, give it a couple gentle twists & check for fit. When the new pins got close to bottoming out I quit, figuring over time the wood & the pins will wear in the last 2%.
Here are the pictures of the measurements I sent to Gordon Orth, looking back at the pictures, the old pins didn't fit all that well. I seem to remember trying pins from my other guitars in the GF 60 & none of them fit right either. They were all too big or too small, mostly too big I think.