Ken, I just read this whole thread looking for the dimension you have decided on for pin separation and can't find your post to that effect. One post mentioned that Buck Hamlin mentioned that 1.055 is suitable for small gauges, but I remember that you posted the dimension that the builders had decided to use. Can you repeat that dimension for us? By the way, my baby frame ten gauge has lots of extra room between the breeches and could have been made with less than 1 5/32" separation. I will show you the gun on my next visit. I had an order for a light ten ICD ready to go when Steve Lamboy quit. I had fooled with the ten gauge prototype and finally found an ICD that would cause me to come off my money. Maybe a Lefever? Bill Murphy