I personaly be worried about the thickness,if your adding chambers that could give it more support.But i still be Paranoid about it.Dont use silicone get the acrylic glue(if you didnt know) a hell of a lot better bond.
Trust me I am over cautious person(the more the better) and i would definetly go for 6mm as to 4mm,see what other people have to say but i say go for 6mm
Trust me I am over cautious person(the more the better) and i would definetly go for 6mm as to 4mm,see what other people have to say but i say go for 6mm
I would recommend the 6mm (quarter inch) as well.