When you need to set the height of your TS blade to half the thickness of your workpiece(regardless of its thickness), try building a teeter totter. A what? Like this:
- Get a flat scrap of wood and mark perpendicular lines across equal distance between each other and from one end of the board. This is your teeter totter.
- Raise your TS blade higher than you expect to cut and rotate it so one tooth is at top dead center.
- Lay that flat board across the blade where the middle line teeters on the blade. (technically, the far side of the blade, not the face closest to your workpiece). The edge of your blade becomes the fulcrum.
- Now position your workpiece under the other line on your teeter totter like this:
Now alls ya gotta do is lower your blade until the far end of the board just touches the top of the TS. I can add more diagrams if need be. Hope this helps.
-- Backer boards, stop blocks, build oversized, and never buy a hand plane--