I have been doing some this way since the 70s. As they say, alternate crossing them and straight. I tend to throw them away after I use them once. they are cheap and I don't like the mess. Used to put them in cat litter. It cleans them up like new, but they get weak after a while. I use about the same number on any size plane. Put them on until you can't lift the leading edge. usually 8 to 10 does it.

Everyone will have their own opinion, just do what feels right, but make sure it is tight.