Spellbinder,
By the way the L80T's you pictured look to be in excellent condition.
I got a pair of L80t's about 6 months ago that cabinet wise were in good, but faded shape. The woofers also needed to be refoamed. I sanded the cabinets and applied stain to the cabinets to refinish. I replaced the electrolytic caps in the crossovers, deoxit'ed the connectors to all speakers, and resealed all speakers and terminal plates with double sided speaker seal tape. When done I was very pleased with the cosmetics and pretty pleased with the sound also. But I did notice that these speakers were pretty 'bright' in sound. Now, I had been using refurbished New Large Advents, so this was a pretty big change in sound from those.
Then, I think it was BMWCCA, who suggested that the L80t3 crossovers could make a significant improvement in the sound over the L80t crossovers. So, about that time a pair of L80t3 xovers came up on Ebay and I got those and installed. To my ears these did change and improve the sound. The highs were tamed and the mids now came through in better balance with the highs. The bass had always sounded good and still did. I definitely am happy with these, my first experience with any JBL speaker.