Hi,
This is a great question and something I feel that many players don’t find easy. Firstly as you mentioned it’s important to keep your weight forward as you have less margin for error when playing down the line and it’s easy to hit the ball too long. Also what you may find helps is adjusting your feet position to allow you to rotate your body the same way you should when playing across. To play down the line you should be slightly more side on so right foot further back (If your right handed) this means the energy of your shot and body movement is now facing where you want the ball to travel.
Another top I really like for playing well down the line is thinking about how you contact the ball and bat position. Again because you gave less room for error playing down the line you need to try to brush more on top of the ball to generate spin to bring the ball down, as you said you find there isn’t much spin. What’s also helps is having a slightly higher starting position with the bat, this means again your hitting more on top of the ball to keep it down and forward. As long as you are focusing on spin this higher bat position can really help.
The last small detail to keep the shot more forward as you mentioned is to make sure your on your toes and have a good bend in the knees which both mean you are balanced and able to adjust quickly to keep your weight forward.
Hope that is helpful and let us know how it’s progressing!
