I have three seedlings of C. walkeriana 'Carmela' semi-alba, and wanted to try growing it three different ways. Initially when I bought the plants, one went on a section of tree fern, the other two went into plastic net pots set inside a standard plastic pot until I decided what I wanted to do with them.
I had been thinking of mounting one of the three. After observing their growth for awhile, I decided this would be a good project for the morning. The plant I chose was one of the ones in a net pot, new roots beginning, but not progressed too far:
There is a new growth with some new roots at the base.
Next, I looked at some of the possible mounts I had available. I opted for a natural piece of heart-of-pine, then evaluated which side to mount the plant on. Having seen other mounted walkerianas, they seem to spread a lot on mounts, so I didn't want the mount to be too small; better to have room to grow:
I added a wire to the mount and placed the plant low on the mount, going upward. Here it is (although I straightened it a bit after this photo):
