Good, I'm glad to hear it booted. I was a bit worried about that since I hadn't personally tested it. It's odd that you had problems with 1305. I used 1305 for months on a different striker extreme and did fine. The main point of 1405 was to fix certain X-Fi issues in Vista. If you are using a 45nm CPU be sure to put 1504 on it for best results. If you decide to upgrade to a 45nm in the future then definitely make sure you put 1504 on BEFORE swapping CPUs.
And yeah... you got one hell of a deal. Glad to hear you are happy. Keep me posted and welcome to TPU! Hang around for a while, it's a great forum.