Keath Kearcher can do a ST to DT conversion. I believe the cost is $300. The auto safety becomes manual after the conversion. This is from a discussion at the parkerguns.org website forum. Greg, I think the 20 ga Repros are fine at around 6 1/2 lbs. Definitely not too heavy to carry all day. Nice weight for 1 oz pheasant loads or some duck hunting (all Repros are ok for steel in mod or looser chokes). I would not buy the 2-gauge set though.
Joe