FJA XXX / JSX /3120 mod

$495

change over to 6550 power tubes

$175 plus tubes

bias mod

$145

custom output transformer

$395 installed

custom choke

$125 installed

replacement XXX/JSX head box w/tolex

$325 and up currently not building headboxes

re-tolex XXX/JSX head box

$195 and up