I just want to gloat. : )

[GM]

Vott Mentioned I should check into possibly tuning the cabinets....

Short of a major re-work to open up the internal shelf or replace it with bracing, tuning a DBR empirically would be a tedious task plus it's probably pretty well tuned already, so just needs to be driven with a period correct high output impedance amp or EQ'd if SS driven to mimic its smiley face EQ.

GM