I read some other postings on the pf9 that indicated after 600 rounds the pf9 showed excessive ware was loose and needed to be rebuilt I think it was Texas Gun. Other posts indicated it's a cheap gun while other posts say that it's a quality gun that is just inexpensive to make. Most reviews of the pf9 have been positive, I hope i didn't buy a cheap gun or one i can't practice with. Any thoughts.