Exactly! And 8" ahead of the breech plug for the first underlug is incorrect. Make a full sized drawing, starting with an outline of the barrel on a sheet of paper..drafting paper or shelving paper is good. Then draw in the lock plate. Full sized images of most locks appear in TOW's catalogue...just trace it and transfer it to your blueprint. With the sear bar drawn in as a dot on the lock plate, you can place your drawing of the trigger exactly where it will work best. Draw in the web thickness you want between the bottom of the barrel and the rod hole...keep it slim (1/8") rod hole no more than 3/8". Now the bottom line of the forestcock can be added. And on it goes. Drop at the comb should be ~ 1 3/8" and at the heel (optional, but ~ 2 3/4") From your trigger measure back to mark your length of pull, and draw in your butt plate. Draw in where you want your rod pipes...three upper and an entry pipe are nice on a 48" long barrel, but two upper and an entry are fine too. NOW YOU can see where to place your barrel lugs and front sight. This is enjoyable time well spent and will give you the confidence to say, "this is excellent! This is going to work well!! Instead of, "boy, I hope this works out."