It is not so much the front to back movement as it is the left to right twisting of the top that you want to brace.Stand on the gunnel at the stern and move the top left to right and you will see what I mean.
nope,mine was tight at the deck.I like the brace/bracket under the windsheild bolted to the console,why not put and extra bar horizontal on each sde as well
Don't make that thing too stiff. They have to be able to flex and move some!