Hi - I just saw your post on the ebay twincooler thread. Who was the ebay seller you bought it from? did the pipe break/split at a junction point or where it was clamped? This is the fist I heard of this issue. I thought all I had to deal with were fitment issues. Thanks for your input!
by the way, you have created one of the most idiot proof retrofit write up for anyone who can just follow.
I have the 8IU light, but my 4B is 338, and not 338C like yours. Not sure if i need to upgrade my hardware version.
Hope to hear from you.