I just received two of these commercial grade kits. I measured the inner and outer corner brackets with calipers. They all measured 0.190" or less. None of the steel parts measured thicker than that. In my book, that makes it 3/16", not 1/4".
yes you can make it just about any dimension with added kits
Yes, I made an 8’ by 16’ float and it worked great. We even used 2’ by 12’ lumber. She floated on her lines evenly with an older floating dock.
Please call us at 1-888-PLAYSTAR (752-9782) and we would be more than happy to assist you.