There's been a lot of discussion about standardizing targets so that the world of slingers can get a better sense of realistic expectations about accuracy and also perhaps have some friendly competitions. I have been looking at how to develop a lightweight and portable target that approximates the standard 1.2 meter square target described by Vicente at:
http://slinging.org/index.php?page=balearic-sling-competitions---vicente Of course, if you have a truck or a big back yard, you could make one exactly as shown and have at it. But some of us apartment dwellers who drive Smart Cars and the like would have trouble with a full size wooden contraption with a gong. So, I went to Home Depot (any building supply store would do) and bought a few things, cobbled them together, and went out to test it. Jan 18 will long live in my memory as a quantum leap in my understanding of the sling - and lessons in humility.
First, the target: just buy two 10-foot lengths of 3/4-inch PVC pipe, preferably the heavier of the two standard weights (PVC conduit is also acceptable), and 4 PVC elbows for connectors (cement is not required). This is very cheap stuff, by the way - we're probably still under $4. Get some rope, wire, or bungee cords for hanging it from something, and you are good to go.
Cut the PVC into four 45-inch lengths, add the elbows to connect them, and you'll have a square frame that approximates Vicente's target (the elbows add length, so the frame ends up about 47.2 inches which is exactly 1.2 meters). You can cover it with fabric or tarp material, but you don't have to, and you can make a tripod to give it height, but that is also optional. You can also hang it from a tree - or the outside of a tennis court fence, as I did. Measure your distances of 64 and 96 feet, and you're ready to shoot.
Lessons learned: it is WAY different throwing at an elevated target than a bucket on the ground. And a lot of skill goes out the window if you change from a habitual throwing distance. I did really badly! But now I know what to expect BEFORE I get to Mallorca and make a fool of myself in the Balearic Islands. Practice, here I come!