Thanks, now I think I understand the key to straining, and why cloth is better - because it allows more flexibility, more pressure, and more mixing and agitating of the material, to get the most liquid out.
Either way the root needs maceration to coax the kavalactones out of the root, attached to lipids so they can sit in a liquid suspension. The strainer is good BUT you still have to macerate the root to release the kavalactones, whether you do it by massaging by hand in a bowl then putting it through a strainer, or lots of stirring and restraining, or by running it through the blender before straining.
Otherwise, the only hope you have of getting the kavalactones into your body and to your receptors is by consuming the root, perhaps breaking it up a bit in a strainer first into smaller particles, and letting your stomach and its acids do the hard work of releasing the kavalactones from the root material, basically toss n' wash.
The formula is "maceration into suspension = krunk" and it has to happen somehow, whether in a bag with you kneading it or in a blender with you blending it or in a strainer with you essentially grinding it through the strainer or in your stomach where your innards do the work (and pay the cost, if not today then eventually), something has to physically release the kavalactones from that root and get it to your receptors in usable form. Whatever works best for you. Centuries of practise have given us trad prep, but KWK concentrate is pretty nice and candies are awesome and my blender krunk prep is nice and the Manoan prep is good, and well, whatever you like, whatever gets you there, go for it.