I am definitely not a tree tube expert, but I can share a few tips/experiences that might help others out:
-I no longer use the bird nets. If you leave them on, they will distort the top of the tree (at least oaks trees). Since I stopped using them, I have not found one tube with a bird nest in it.
-Hornets will build nests in them which will also damage the tree top. Checking the tubes each season is a good idea. Coons will go after the hornet nests and knock the tube over. This happens on a tiny % of the tubes but if you have any ideas to prevent it, I am all ears.
-3/8 Rebar is tough to beat for stakes, although it is a little pricey now. 1/2 Bamboo is also ok as it is easy to insert in the ground. I will know after this year how it holds up. The 1 inch oak stakes should work but I would not want to pound many of these in when I can just push rebar into the ground by hand. Just keep tabs on your rebar stakes because you don't want to lose them in tall grass where you may drive a vehicle of some sort.
-And finally, if you are married, your wife will never understand why you want to pay $2.50 for a tube and $0.75 for a stake to protect a $0.40 tree.:grin: