I would also cut off the extension and add a pad. I recently did this on a LC Smith Specialty grade 20 gauge with 32 barrels.
It Looks so much nicer. It had a well fitted wood extension but still looked like a wart on such a nice gun.
Found and purchased an old stock new Hawkins pad for $35.00 and another $55.00 a local custom gun shop cut off the extension and fitted the pad.
At $90.00 it was an easy decision.