Not sure how well that would work on a CR38 but if you could borrow a block or two to experiment
with it's always worth a try, as was mentioned earlier the hull
design also has a huge effect on pointing ability.
I've had boats with the second inboard track but they were fin keel/spade rudder
On one boat I used a temporary block placed inboard to get tighter sheeting angles for upwind use, but again that was a fin keel
Are there any CR owners sites that might have more specific insights?