Since I train at a place where my friends also train their 26" jumping dogs I made the maximum height 28". I was actually aiming for 26" but to be able to get all the heights that I wanted (8" to 26" in 2" increments) I ended up with a total of 28". In retrospect I could have made two 6" pieces instead of the 8" and 6" ones and ended up with a total of 26". The base and curved top pieces total 8". The additional pieces are 2", 4", 6" and 8".
A nice feature of the jump is that all the pieces fit in the pillars for easy storage and transport. I will admit that it is a good thing that the pillars are flexible as I had to force them into the back of my CRV. I am planning on taking it to the training facility this week and giving it a better test what I could do in my backyard in the snow.
Another very important feature to me is that this jump is less likely to cause serious injuries if a dog hits any piece of it.
I am not sure how much wind the jump can take and it will be a while before it can be tested on grass. It will hopefully be fine for indoors and calm days.
Here is a video of me assembling the jump.
Nessa and Taari testing it out in the backyard.
After more testing I can write out the way I would make it the next time (I learned some things along the way) and post it if there is interest.