I'm seeing it is wise to stay away from the entry-level line, due to slide failures/cracking? How can one tell the difference between the older slide and the newer "rounded" slide? Would there be the same problems with the Elite Stock or Match? Would this line be the one to go with? If so, would you still need to replace any springs? And if yes, where do you get the springs? Holsters for the Elite line? Thanks so much for any help you can provide. I'm anxious about trying out the 10mm round.