I have seen a couple of post, however no detailed description ... any help?
I cant help you out either mate, as I own a TB. But.......I think No Doubt has had some experience with the 348 top. He owns a 348 Spider and I am sure I have seen some help others before with the Spider top, so hopefully he will post some helpful info for you. If he doesnt post soon, I will send him a PM for you.
It would depend how good at DIY you are, I had a new top fitted to my car, I sent it to the shop as it was part of the purchase agreement. It can be tricky getting it all to line up and seal up properly. The glue is nasty stuff and its sort of a one chance job, miss and its going to get messy. Make sure you cover EVERY surface when you start using glue! Don't ask how I know this.....