Welcome from down under .
I threw Apache for over a year and found the same thing . The realease and projectile weight effect the vertical aim. Horizontal aim much easier to grasp.
I also sling short slings , used a 24 inch for most of my slinging days but resently retired it and pulled all the sag out of pouch and now it's 27inch . A very comfortable length for me and the styles I throw.

Cool!

Thanks for the nice re-welcome!

I think the biggest reason my vertical aim is off is because of my recent switch in slings -- both of my new ones release a lot faster than my old one did. At least my shots more or less go where I want them to -- just a bit high or low. It probably doesn't help that I usually sling from a hill at things below me...

I'm not surprised that there are more Texans on here, but I won't be back here for too long because I go to school in Iowa.

I'm kind of peeved that I refused to try a split pouch sling until a few days ago. They're wonderful. I did slinging for a few years, and didn't even bother trying one. I'm surprised at how easily I can throw different sized rocks -- even really small ones.

My carnivorous plant collection is pretty extensive -- I've grown them for almost a decade now! I've got a bunch of flytraps, a couple Nepenthes, Cephalotus, and a handful of other stuff. My flytraps have been suffering from the heat, but aside from that, they're doing great. I harvested some seeds from them this year, and have a nice batch of seedlings going.

tutorials and other website sections got virussed - haven't fixed it yet.