Mainsheet
To control the big main, skippers use two 40 mm Carbo® singles on the boom and one on the traveler car. Some skippers like to cleat the mainsheet and bolt a swivel base with a 57 mm ratchet block to the end of the centerboard cap. To help with getting the boom across quicker, a jibing line is attached to the boom at the same location as the forward block. When it comes time to jibe, the skipper pulls the jibing line across instead of pulling in yards of mainsheet.

Traveler
All Thistles must have a traveler track across the top of the transom. Use a low-beam Small Boat track with a car and a 40 mm Carbo block shackled to the car. Some boats opt to not use a traveler on that track and instead bolt a 40 mm Carbo single stand-up block in the middle. The control lines are led outboard and turn forward to 29 mm Carbo cheek blocks and micro cams with fairlead covers. The advantage of using a traveler is the ability to bring the car above centerline while sailing upwind and easing the main to centerline to induce vertical twist that is fast in choppy conditions.
Hiking Strap Adjusters
Each crew gets their own hiking strap. Being able to adjust the strap length helps the crew keep the boat flat and keep themselves from dragging in the water. The crew uses looser straps while sailing up wind to hike hard and stay out of the helmsman's sight lines, while the boat is heeling over. They use tighter straps when reaching to make moving in and out easier.
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