Gj teaching this guy some BnG stuff, a few points though:

[Sensei`hcp] you had 0 zook wind, always use that
[PIK01] i dont know where the zook is going if there is 0 wind...

You don't ALWAYS have to use 0 wind, 90% of the time yes, but there are some occasions where nade is better, you will realize when these moments are over time I guess.

Also, you should tell him that 0 wind is pretty much exactly like throwing grenade, because wind can't affect grenade, it's not 100% the same though, the further you aim the more you will see a difference if you pay close attention, zook goes the smallest amount further than grenade, I don't know why it just does... And the further you aim the bigger that gap is, it really is like pixels though, but it pays off to know this and learn it.

Also, I know you hate 4s rollers but please don't encourage him to NEVER use them, if you talk to him about 4s rollers try to explain the difference between abusing them and using them when you must.