I built a 2X10FX guitar cabinet back around the time the plans came out. Does anyone remember when that was because I don't have any idea what I did with the purchase email.

I bought the whole cd and then only got around to building the one cab. I built the cabinet and tried it, stuck it the in the attic, sold the drivers and now I want to bring it out and finish covering it and get some drivers. So, no immediate plans for another build.
I thought I'd put my 2 cents worth in after reading the update procedure, and say I would pay extra next time if I new my payment info was going into a data base that would make it possible to keep a record with you. At the time I bought the original cd the last thing on my mind was keeping a record.
Just to clarify, I don't mind paying full price for updates, I know your aren't Amazon, but a little webpage magic would help new users keep track.