I am the sixth master and I say that this cover is fine in armour and without armour. And with this cover I can cover in every direction, and enter in all binds and grips and finish with a strike. And my scholars who come after all end up striking. And each of my scholars can do this cover, and they show the plays that continue from here.
The 6th Master enters the play from Posta Mezana Porta di Ferro. Although shown defending against an overhead attack, by arcing your arms around in front of your body, you can see that the same defence will work in any direction. The attacking dagger is also kept at arms length, making it safe to do without armour.
The 6th Master has a lot in common with the Dagger 2nd Master. It is in many ways the same technique, but performed at a greater distance. Again, you are not so much blocking your opponents dagger as attacking their hand.
From Posta Mezana Porta di Ferro, keep your elbows at your hips, but raise your forearms. When your forearms line up with your opponents attack, drop your weight onto your front foot, keep your hips square, and drive both arms forward in a straight line. Keep the dagger horizontal.
The sooner you can strike, the better this will work. Ideally, you are aiming for the base of the hand. If you hit it hard enough, it will pop the hand open, causing your opponent to drop their weapon. Your priority, of course, is getting under the dagger tip, so in practice you may end up striking as low as the mid forearm.
You should end up in a very rectangular structure. The dagger, your shoulders and your hips should make a series of parallel lines facing perpendicular to the attack. It will have the sensation of momentarily pushing against a heavy load.
From here, you will be able to enter the plays of the scholars.