Topsheet is .8mm & base is whatever thickness, usually 1.2mm

There probably is, but I've only seen & used flame treatment. It's easy to forget those last second things.

Tip/Tail delam, not sure if you did this, but did you oxidize the pe after sanding?

Titanal doesn't really add pop, it works more in dampening or smoothing out the ride. I use it on my highest end boards & results have been great. You have to be careful how much you use though or you'll have a really smooth ride with no pop. I use carbon to add pop, but for the big mtn/hard cha...