Click to set the "cut" of a prim...

I have a script that sets the "hollow" of a prim when clicked. I would know like one to do the "cut" of a prim, but can't figure out the syntax... I have found this on in the wiki: cut/dimple/advancedcut x and y range from 0.0 to 1.0, x must be at least 0.05 smaller than y (z is ignored). below is my current "click to hollow" script. Help!

Thanks

//Click to set HOLLOW %

integer open = FALSE;

default {
    state_entry() {
    }

    touch_start(integer total_number) {
        if (!open) {
            llSetPrimitiveParams([PRIM_TYPE, PRIM_TYPE_CYLINDER, PRIM_HOLE_CIRCLE, <0.0, 1.0, 0.0>, 0.35, <0.0, 0.0, 0.0>, <1.0, 1.0, 0.0>, <0.0, 0.0, 0.0>]);
            // the 0.9 is how hollow to make it.
            open = TRUE;
        } else {
            llSetPrimitiveParams([PRIM_TYPE, PRIM_TYPE_CYLINDER, PRIM_HOLE_CIRCLE, <0.0, 1.0, 0.0>, 0.0, <0.0, 0.0, 0.0>, <1.0, 1.0, 0.0>, <0.0, 0.0, 0.0>]);
            open = FALSE;
        }
    }
}