Setting up gymnastics

So, I have very little experience setting up my own little gymnastic grids. For the most part I can just eyeball it and get the striding right when I set them up, but I was wondering what the standard measurement would be for a 1, 2, or 3 stride line. My gelding is about 14.2 hh, but he's incredibly adjustable and can make either a "horse stride" or "pony stride" so I'm not too worried about his size being a factor.

Also, what is the general distance you would use to set trot poles? Both on the flat and on the approach to a jump?

Willie is fit enough now to jump on a slightly more regular basis and I'd like to be able to set up some exercises for the both of us. By the way, he's fully trained and such, he just needs a bit of a brush up on his skills as he gets back into shape.

A horse stride is about 12 feet, your ponies stride is probably about 10-11 feet. There is many different ways to set up gymnastic lines. I usually set up gymnastics with 4 cavaletti poles set 4.5 feet apart for trotting. The Ill add 3 bounces which are 9 feet apart. What I like to do is set the first bounce 9 feet from the last cavelitti, then make the second bounce about 9.3 feet, then the last bounce about 9.6 feet. The you can set up a 1 stride which is 12 feet, but for you I would do 10 or 11 feet to start out with so your horse doesn't have to open up too much. Then you can set the last jump up about 21 feet. I like to use the last 2 jumps in the gymnastics line to gradually raise up, so you should have more distance in between them, because obviously the higher the jump the shorter the distance to the next jump is.

Hope this helps.

Thanks very much Erika!
I'll have to drag a friend out with me to be my jump crew in case I need to adjust anything after setting up and riding it.