I've messed around with sheet to tiller systems a fair bit on my Hunter 23. They do work well when the sails are balanced and the winds are constant, however, in my area at least, the winds are never constant. It is a fun exercise though, and you will learn a good deal about proper sail trim.
I've found the best way to rig things on my '23 is to clip a looped end of a medium diameter line (about 3/8") to the traveler/mainsheet block, then detach the block from the traveler car. With a pully attached to the traveler car, route the new line back to where the mainsheet attaches to the boom, to the end of the boom, down to a pulley on the leeward side of the boat, and finally to a cam-cleat on the tiller. This line is then counter-balanced by the elastics on the windward side of the tiller. Preferably, use 4-6 short lengths of surgical tubing. Attach/dettach tubing as needed to account for wind strength.
If you are curious I can take a picture of the setup when I'm at the boat this week. Its pretty slick when routed this way, mainly out of the way of crew, and finger-adjustable with the mainsheet vang.