Would you consider this amp a refurbish or a mod? It seems there are better ways to refurb using FP caps in lieu of this circuit board
http://cgi.ebay.com/MCINTOSH-MC75-MC-75-TUBE-MONO-AMPLIFIER-W-TUBE-CAGE_W0QQitemZ310208146364QQcmdZViewItemQQptZVintage_Electronics_R2?hash=item4839d8abbc
http://cgi.ebay.com/MCINTOSH-MC75-MC-75-TUBE-MONO-AMPLIFIER-W-TUBE-CAGE_W0QQitemZ310208146364QQcmdZViewItemQQptZVintage_Electronics_R2?hash=item4839d8abbc