All,
1 - Can we just plug the A pillar with a foam expander or any other product which essentially "seals" the A pillar? Sort of like that foam piece found on the Y teardown
When I suggested this in the recent past, some "helpful" individual kept loudly opining that this would result in corrosion inside the A-pillar. When challenged on the source of moisture, I got crickets. A lot of arm chair experts here. I'm thinking if it was an easy solution, Tesla would have just tweaked things at the factory to shut us up.
The expanding foam treatment was reasonably effective for me...enough so that I've been too lazy to bother with the additional door and trunk/frunk seal kit that I purchased at the same time.
Best,