I tested the 48" wound florescent tube cover tank to failure this morning. At around 1500 PSI it started weeping around the o-ring. At between 1900 and 2000 PSI the pins on the aluminum end cap failed. All the pins were sheared off, and none of the spectra was even torn. I'll post detailed pictures later.
(The tank was 337 gms and held 1.65 Liters of water. for a MR >5 at 1500 PSI)