I thought it might be nice of me to offer some of the projects I make for other people to follow. Not everything I do is CNC related. That explains this first project, which is a DIY Suspension trainer. This is a type of exercise equipment, popularized by the company TRX. The basic concept is nylon webbing sewn together, which are used to do various bodyweight exercises. Now, I will say, the name-brand version of this is probably better made, but they are pricey. And I am cheap. So I decided to make my own. I should point out that this is not a thoroughly tested design. It is a design I came up with browsing other designs on the interwebs. I can’t say if it will hold you, I don’t claim it is safe, and I don’t recommend you do this at home. This is just a blurb about what I did, for me.
For materials, I got a pair of tie down straps, a ratchet strap, and two pieces of 3/4 inch PVC pipe (nipples), 6-inches long. Total cost, $14.26 at Home Depot. 
Step one: I took the tie down straps, and made a loop about long enough so the buckles would be past my arms (behind me) while doing push-up type motions. I cut the excess off, and used a butane lighter to fuse the ends where I cut the straps. I fed the material through my pipe nipples, then pinned it together. I used my 1968 thrift store Singer sewing machine ($11.25, I kid you not) to sew a series of wide stitches, one about every inch and a half. I had seen other guides suggest just tying the straps, but that lowers their load capacity.
Step two: I took the excess material, looped it through the PVC pipe handles, and sewed that several times. These form the foot loops. The final step, I just took the long strap part of the ratchet strap, snipped off the hook, and fed it into the buckles of the tie downs. I could have just gotten plain webbing at a fabric or camping store, but that would have been another trip. This part will be looped over a tree or whatever I can hang it from. I have an idea about making a shorter, knob on a strap thing that could be wedged into a door, but I haven’t done that yet.
And that’s it. Not too complicated, which is the whole idea behind this kind of trainer. It’s simple, portable, no muss no fuss.