Push the boom at your own peril...
Basically if you backwind your sail you're at fault if anything happens; or even if nothing happens but the windward boat starts yelling at you.
E (who got flagged for backwinding his sail though no contact had occurred and was told by the jury that they...
Backing your main will attract judges attention more than sculling. Neither is illegal when done within the rules but in y experience backing your sail is easier to spot for the judges and will attract their attention more than sculling.
And you really don't want to attract attention.
But if the manufacturer no longer provides the class legal sleeve, I would not feel bad about using a similar generic alu tube.
BTW, I have a class legal sleeve on order with ASP for a backup boom; we'll see if they deliver.
If I only had one boom and needed a sleeve, I would not wait for the...
You should flip the top mast if it has two rivets in the collar (which it will, if it's a 1988 mast). Reinstall with one rivet only.
You should also install the sleeve in the boom. It will break even with the old style vang.
If your upper mast collar has two rivets, flip the mast and re-install the colalr with just one rivet (whether the mast is straight or not).
Then buy a boom sleeve
Laser Boom Sleeve - 90418
and install that as well.
Now you can go sailing.
If you're into racing, upgrade to the new controls and...
Does not look like you have the boom sleeve installed (Laser Boom Sleeve - 90418)
Install sleeve and drill the right size holes in the sleeve and you'll be fine.
If you don't install the sleeve, you will break the boom sooner or later.