So let me get this right............... Your gun dealer screwed the barrel in 'a bit' to correct the excessive or over adjustment of the foresight? The obvious question is was it screwed OUT too much before hand? If I'm reading this correctly, then............................. Oh never mind.

Maybe you ought to get your gun dealer to read this thread and another thread about barrel alignment. I wonder if it ever occurred to him that it MIGHT have been a simple matter of fitting the fore-end correctly.