So just as a curiosity Q., here, who was the vendor from whom you purchased that boot? Mine was probably pre Covid OPGI because, like I commented, all the ones that I managed to discover and harvest from various hulks and wrecks showed pretty much the same kind of damage/tearing in pretty much the same place/location on the boot. I even tried to repair one by way of using some RTV adhesive sealant to bond the torn edges back together; it looked good sitting there on the bench but did not survive being attached to the firewall.
Nick
Nick