Finally mostly finished it! I just need to waterproof the plywood. I shoot along my side yard, in an urban area. Unfortunately, this is not very safe, but there are not that many other options. I came up with this solution, so I thought that I would post pictures just in case there were others out there that were in my same situation. I thought that maybe this would give someone some ideas on how to do it perhaps a little bit safer for the neighborhood.
After I built the whole roll around target stand that you see in the background, I realized that even though it is over 7 feet tall it would only take a few degrees of bow elevation to send an arrow over the top even at 18 meters. This would not be an aiming error, but could easily be caused by some unforeseen equipment failure, or a release error or etc. Since I'm shooting toward the street, this could be catastrophic. As you can imagine, I cannot afford to have even one arrow make it out of the yard.
My solution was to intentionally restrict my "field of fire" in the up direction. You'll see in the bottom photo my actual shooting view, which is quite restricted and will not allow an arrow to sail over the fence, and in the top photo, the actual assembly that I built that causes the restriction. I now feel very safe in shooting this way because I would have to intentionally aim the bow up at a 30 to 45 degree angle to get an arrow past the plywood blocking sheets.
If you are in the same situation as I, please take into consideration that an accident can happen, and even 3 or 4 feet of safety backstop above your target may not be enough of a buffer to prevent a tragic accident.
What do you all think? safe enough? any thoughts on making it better? Any questions on how I built the stand or the target backstop, let me know.