There are different methods of fitting according to custom golf club manufacturers but ultimately they are all trying to improve your game. To begin with simple measurements such as wrist-to-floor, height and hand size are taken and will point you to the right size club and at what angle it should be to the ground. Then you will take a club and hit some balls. One method is to place impact tape on the bottom of the custom golf club and an impact board on the floor.
As you hit the ball the board will leave a mark on the tape showing whether the heel or the toe of the custom golf club is striking the floor first. The resulting mark will show whether the club face needs to be flatter or more upright. Then things get a bit more advanced. Analysis equipment can measure everything from your club speed to the side spin of the ball so that you can get maximum distance from your shot. You can also measure the launch angle of the ball, how much backspin you generate and impact efficiency – all which affect distance. The angle in which the custom golf club approaches the ball and the sidespin of it can help fix your game too.
Rather than bringing down your old clubs, it might be better to start from scratch. It’s a big misconception that custom fitting is only for good golfers. Anyone can benefit. That said, if you plan to upgrade a new set of clubs with the same manufacturer they may be able to adjust your old set to become custom golf clubs.
Custom fitting won’t cure all your bad shots. Coaching will sort that out. But if you do make a good swing, then the custom golf club will arrive correctly at impact and should produce a straight shot at your target. That alone will save shots during a round.
Lastly, custom fitting is often free of charge. But it is usually on the condition that you buy some clubs once you’ve been fitted. So it really depends on what your budget is. If you’re prepared to buy a new set of clubs it’s definitely worth getting fitted.