The trouble with a receiver-mounted scope on a take-down shotgun is that every time you remove the barrel and reassemble it, retighten the magazine cap, etc.,you'll change the relationship between the reciever and the barrel. you'll have to re-sight in your scope. Go with a cantilever mount.
+1
Everything that you say is true. i went with the iron sights and that was the wrong way to go.That barrel will go away at the next community yard sale-at a big loss and then i'll get a cantilever barrel.