WARNING: I don't advise anyone to bolt this and try to climb it. This is still the version 1 and there are some dangerous mistakes I made.
There are two particularly dangerous spikes in the hold that can cut your fingers. Either sandpaper it or wait until I release the version 2 where I'll fix it.
Because it was printed on PLA it is as slippery as an eel. Therefore I had to add small spikes to make it more grippy but all it takes to make you slip is a drop of sweat. It is even worse as a foot hold. I can guarantee you that your foot will slip i you stand on it.
I am testing new materials, new designs and improving this one and I'll keep posting as I make new discoveries.
-v1 - first iteration... dangerous spikes and very slippery
When bolting you can hear it breaking inside. It would be best if it was 100% infill around the bolt. Mine hasn't broken with only 40% but it's matter of time