I recently sold my gladiator and have the coverking and sound deadened with rollers available for $300…paid $480 for all of it. Unopened boxes.
I live north of Atlanta if interested.
I didn’t measure it prior, however it haven’t noticed a change. I periodically look from different angles and degrees of slope with no real notice in sag.
After a short 12 week wait the top arrived! No visible quality issues, however there are several spots that need cleaning…excess glue, fiberglass dust, etc. I really like the extra space!