I have a Glock 17 which worked flawlessly for one year. Then I diasssembled the frame and put in a Glock 3.5 # connector. I also changed my mag springs to Wolff 5% extra power. Now my 17 is having feeding problems. The rounds sometimes stay in the magazine and do not feed into the chamber. Any thoughts as to what is wrong would be appreciated. Perhaps I did not reassemble the gun correctly? Thank you.