Mushy Helm
Add speed, add power. Often a mushy helm makes it difficult to point. Ease sails for speed, and then trim up. Add more sail shape to the point of nearly stalling the main. If the main does stall try a little twist to encourage flow. Fig. 15.

If you've got a bigger jib available, then change.

If your performance is good, then live with it.

Fig. 15 (right) Add power. In light air it can help to add heel. Or, if performance it good, learn to live with it.

...Hyper critical groove, with the inside telltales spinning one moment, and the outside telltales dancing the next.
There are two ways to widen the steering groove. The textbook solution is a tighter halyard, to pull the draft forward and round the entry. Fig. 16.

Often a more effective solution is to ease the genoa sheet a couple of inches. Sagging the headstay can also help. Of course, if you are pointing high and going fast you might want to consider another alternative: Live with it.

Fig. 16 (above) If you can't settle the boat in the groove ease the genoa sheet a couple inches, tighten the halyard, or sag the headstay. (Or change drivers.) Boat A: Narrow steering groove, Boat B: Wide steering groove.

...Hyper critical power. Slammed down one moment, upright and luffing the next? Just can't settle on a constant course and angle of heel?

Then try more twist. What is happening is that the entire sail plan is filling and dumping. Adding twist will give a more gradual onset of power. Move the jib leads back and ease the main sheet (while pulling up the traveler).

In puffy conditions aggressive sheet or traveler work can also make the difference. Sometimes the genoa alone is too much sail in a puff. Try a smaller jib and more powerful main; then play the main aggressively in the puffs. Fig. 17.

If a jib change is inconvenient at the moment try extreme twist, with the leads way back and the top of the genoa completely open.

Fig 17 (Above) If you can't settle the boat in the groove ease the genoa sheet a couple inches, tighten the halyard, or sag the headstay. (Or change drivers.)