My gallery has a couple of decent obstacles in it. Look at the trials videos, not just the pictures. I reccomend making everything modular. Look at the CMW 05 site ofr more ideas.
I think cutsheets are useful, but pointless on unicycle obstacles. You’re building disposable wood structures, not bridges. Just look at the obstacle and adapt your own, working as you see fit.
Andrew Carter and unicycles.2ya have some good obstacles, as well. The search button has even more.
You could just collect some of the extra wood (2"x4"s, 4"x4"s, pallets, plywood, other useful-looking junk) from construction sites and nail it together to make skinnies, inclines, steps, ramps, or whatever else you think would make a decent trials obstacle.
You can go behind most plazas/malls/stores and find a bunch of pallets - the only problem is, sometimes the stores have to pay a deposit for the pallets, so you should probably ask them first.
As well as all the ones already suggested, I suggest you have a go at designing some yourself…it’s half the fun! Hopefully www.unicycl.2ya.com will be up and running again soon.
i have a bunch of pallets, some 2x4s, a coupel spools and a junk car laying around in what i think is a semi-difficult configuration. nothing’s nailed together and everything can be rearranged in a matter of minutes. just get as many materials as you can, and put stuff together, don’t worry too much about measurements and what not.
I bought some 8’ lawn timbers from Home Depot and a couple of 2x4s. The lawn timbers are about $3.50 each. I cut the 2x4 into 18" strips to use for braces - one on each end. (I already had some deck screws.) The braces raise the lawn timbers off the ground a couple of inches, and provide some much needed stability. I can move them around the driveway and yard in any configuration. I have eight 8’ lengths, so it’s pretty flexible.