Shimming a tuttle box

[jetboy]

Wondering if anyone has successfully shimmed inside a tuttle box in existing board. I have a go foil with single screw so can't shim the wings. Have heard of it being done; even though there is limited movement in mast to box connection. I need less lift (less weight forward paddle foiling) so thinking of putting washers or some kind of wedge at front of box. Any recommendations.

[bohme]

It works well, as the Tuttle has parallel sides. I wanted to adjust board liftoff to foil stall limit, which is quite important when you are learning.
I have used a 2mm thick (10x20mm) plate attached to the mast with double sided tape, and used aerosol primer to build up a bit of thickness on the sides for perfect fit.

[JakeFarley]

I used to cut up an aluminum beverage can to shim my fin boxes in my windsurfing days. Just be careful with the sharp edges.

[davesails7]

Where do you put the aluminum can shim? Wrap it around over the top, or wrap it around the front?