very good points in there man i recently made a nice glass bong with a storebought slide and bowl, lol it hit so fat, and just to add something to see if its airtight put your hands/fingers/palms over the carb, bowl, and other openings on your bong and blow into it.... if you can...its not airtight and your hits will be weak and shitty so keep trying over and over until its airtight then rip that shit up....youll be glad you did