Am a newbie to Glocks and fear I will not be able to shake this great product from my daily carry status (have had my G36 for about five months and have 816 rds through her so far without a hitch), and truly appreciate all the great information on this site. My only mods are night sights, 3.5 connector and a polsih of the innards, but am thinking of changing the recoil spring (even though I must admit recoil is sooooo gentle with this thing it just doesnt make sense for its size). I only use Winchester USA white box 230 FMJ (its whats available cheapest where I live). I was wondering if any of you could tell how perceptible a difference there is in recoil by changing from the stock 17lb to a Wolff 19lb./21lb/23lb recoil spring and the Wolff non captive guide rod. Also, with the ammo listed above, is there any one of the three weights (19, 21, 23) the you guys recommend over the other the others? Are there any pros/cons to one weight (19, 21, 23) over the others? Best to all. I did do a search on this topic before posting, not wanting to take up anyones time more than needed, but didnt find a thread that directly addressed my questions. If there is such a thread a pointer in the right direction will be appreciated.