This also seems more efficient then a peg board. With this you can put the guns right up next to each other were as with peg boards blasters sometimes have to be arranged awkwardly to keep them from falling. All in all great job and first post.
Thanks I'll probably go with 9" then. Tantum if what you say is true then it's fine because the whole brass assembly will not be glued in. If you looked at the earlier posts we decided to just shove the barrels in with only e tape so that it could be removed if it didn't work out.