Just bought a mossberg 510 mini 20 for my boys to use.Anybody have any experience with these?Love the way it fits smaller kids and the add on butt pads so they can grow with it.Only thing that concerns me is the weight,at 5lbs seems like it might pack a little wallup.Only plan on shooting 2 3/4 shells in it this year and adding a limbsaver recoil pad.Any suggestions/opinions?