I bought some mini-pullies, connectors, fish weighing scales, synthetic twine, and various instruments to measure angles. The fish weighing scales aren't accurate, but, accurate enough to see the trends from the weight measurements. I confirmed the accuracy of the speed line/dwt equations with the fish scales. It sounds chinzy, but 1 can't argue with the equipment used for the science when the theory still matches the empirical data.
Swiveling side plates on mini-pullies would be helpful. My pullies have fixed side plates. This means I need to thread my twine through the pullies. I see the mini-port-a-wrap as nothing more than a marketing ploy. I guess that may be a reason why they were made, besides $$$. For a mini-rigging system it's not needed. I would like to have better scales for small weights. I know better scales are out there somewhere.
Perhaps you guys can put together a Radioshack type experimental laboratory that has the components for measuring the forces in some rigging situations. Then, provide a manual which teaches the physical theory 1st. Then, provide a way to record and present the data so 1 can compare the theory against the empirical data. For those interested in such an idea, something of this nature would be an invaluable learning tool.
Would I buy the stuff as jewelry? Maybe, maybe not.
Joe