has anybody replaced the stock recoil pad for an after marked recoil pad? if you did, do you feel it significantly reduced the recoil? Ive got a rem 870 supermag 3.5 chamber and that things hits like thor's hammer on both ends. a buddy of mine said to get a ported choke to reduce recoil but i don't think that would make a lick of difference. thinkin of trying a supercell for the 870 but don't want to possibly extend the length of pull and not have any recoil reduction. any feedback would be much appreciated.