Questions regarding the new GP kit

Hey riot, first of all as a former GP main (still top 3 played) I would like to say a gigantic thanks and well done on the Gangplank visual rework, he looks amazing and I hope that you will be unlocking sailor gangplank on the release so that I can purchase the last skin I'm missing for him lol.

But besides that I have some questions on his kit, mainly about his new keg mechanics, or his me-keg-nics if you will. the video shows a rapid deployment of kegs, is that just for demonstration or are his kegs on an ammo system like teemo's shrooms? Also there is a slight delay in keg-splosions between linked up kegs, will enemies be able to be damaged by more than one if they haphazardly walk inbetween blast zones? or will enemies only be damaged once by the blasts?

thanks for any clarifi-keg-tion you can give and also just one last question, how large is the upgrade curve on his ult? how much booty will we be needing to plunder in order to upgrade?