Have an FN barreled psa upper, that im going to be taking the gas block off to dimple the barrel..... I know geissele makes great products, ..love their triggers , but is it worth the 60 to get a geissele, instead of just going back with the stock gasblock? Guess im trying to ask what am I getting for the 60? Have there been issues with lesser named gasblocks? A difference in corrosion resistance? "Semi" new to the AR platform compared to most here. Always been a FAL girl so trying to research as much as I can