We also are in the habit of using preventers. If reaching-to-broad reaching we'll run a vang type preventer from the mainsail boom end down to a mooring cleat on the aft deck or to the boom gallows. Similarly, we run a line down from the end of the foresail. We let the boomed staysail fend for itself in all this, typically. If running (or close to it) we want to have the attachment of the preventer to the boat as far forward as possible. So we have port and starboard preventers for the main and foresail. The main preventers attach to the boat about 2 boom lengths in front of the main mast. The fore preventers attach to the boat near the stem about 1.5 boom lengths in front of the foremast. We must exit the cockpit, go forward and release the preventer on one side before we can gibe. We don't gibe "standing" (I think that's the term when you've got all that line out and the boom can swing over in a rather uncontrolled manner) but rather we remove a preventer, haul in (centering) the sail and then gibe, letting out the sheet quickly. In our case, the foresail is gaff rigged so adds another little dance to do--loosen up the peak halyard and pull in on the gaff vang. Then reverse. We focus our gibe efforts on the mainsail and often when running (unless wing-on-wing) we don't even have the foresail up.
The entire exercise is like working your way into and out of a spiderweb on the leeward side of the boat. LOL.
Here's a couple pics. The first, on a run, the second while reaching. You can see the main preventer going forward on the first pic. The second pic shows our mid-ships spiderweb when running or reaching. What you're seeing is a look under the main boom at a combo of things. Can you see these in the spiderweb:
starboard main boom preventer attached to cleat,
reefing line hanging down under main boom,
dingy tied down to same cleat as preventer,
block bringing foresail gaff peak halyard back to cockpit,
foresail throat halyard going back to cockpit,
lazy jacks running parallel under foreboom,
breast-line temporarily run between main shrouds and fore shrouds,
winch for and tail of main outhaul on the main boom,
and finally the hanging down loops of the main topping lift tail which is wrapped around an unseen winch and cleat on the main boom.
A lot of lines.
PS you can also snap a boom using a preventer in the wrong circumstances especially if it is attached to the boom in a location not meant to be loaded up with the full sail load.