I started making stainless steel replacement spools for the Simple after not being able to find any commercially available. I had some 316 round stock left over from a previous project and access to the necessary tools to make it happen. I was very pleased with the performance of that initial spool, having wanted to try one for many years, but didn’t have plans to make any more. It turned out, however, that there was widespread demand for more durable replacement spools as well as for the 2-Hole upper spools needed to keep older Simples in service. As is often the case in the caving world, a one-off home machine shop project evolved into a small business—the goal of which is to provide well thought out and well made niche equipment to the caving community. Stay tuned for more.