I have a pair of L300's that I "thought" I had the surrounds of the 136A woofers replaced about 10 years ago. The reason I am posting is that after reading lots of threads on here about reconing with the 2235 kits I decided to inspect the surrounds and pull my woofers and see what they look like from the back because the cones look different from the front. What I discovered was that the darker looking woofer had "2235A" and a date written with marker on the back of the cone. The other woofer is a lighter, dustier looking color and it had "2231A" written on the back of the cone. This woofer looks like the surround is coming unglued from the cone. The only thing I can figure is that the place I brought the woofers to 10 years ago may have replaced the surround on the one and reconed the other. I definately want to get the 2231A marked woofer redone with a "2235" kit and since I'm basically a fanatic I am wondering whether I should get BOTH of them redone? I forgot to mention that I am the original owner of these speakers.