How much do these things actually hold per side? Most albums I've seen take up four LP-sized platters when done at 45RPM, but that's for a modern, CD-length release. Makes me curious as to how they master a typical 35-minute album at 45RPM. Will a whole pre-CD album fit on a 45RPM "LP" with computerized track-pitch adaption and other wizardry, or do the audiophile releases not squeeze the grooves to begin with?