| I wasn't going to try partial blocks because it is so hard to quantify actual effect. In fact, I'm sorry about leaving the small hand-hold opening not blocked. Still, I think it is important to do "A" "B" "A" tests to quantify the effect under the same conditions.
My concern was a recessed block might lead to air bleeding out the edges. To some extent, there is some evidence of it but the effect is small ... small enough not to be a big impact.
GOOD JOB!
Bob Wilson |