Cam Smith has explained the "terrible conversation" he felt was necessary to arrest his golfing slide ahead of the PGA Championship.The former world number two and British Open winner was the only man to miss all four cuts in the majors last season and has failed to reach the weekend in his past six, including last month's Masters.Coach Grant Field has been in Smith's corner since he was a Brisbane junior but, after a rough second round at Augusta National led to his latest premature exit, a tough call was made.Claude Harmon III, the son of swing guru Butch Harmon, is working with Smith this week at Aronimink Golf Club in Pennsylvania ahead of the PGA Championship."It was a terrible, terrible conversation to have," Smith told todaysgolfer.com, of the decision to split with Field."I've been seeing Grant since I was like nine years old, and he's a really good friend as well, so it was tough."But I feel like I have done the right thing for my golf I think what I've done is right.A perennial contender at Augusta, Smith was gutted to miss the weekend's action for a second-straight year."It's been a rough time in the majors for sure," the LIV Golf product said at the time."I'd like to think probably early in my career that I hung my hat on how I performed in the majors and it's just not good enough."[I'm] making a few changes to try and get back to where I was, and better