With time, and of course repetition, it’s clear that there are absolutes when you’re a maker. In frame building, one has to know what goes where. The rider’s feet, hands, and tushy for example. There’s only one place above the bicycle they connect so that the position is optimum for comfort and propelling forward is done with minimal energy loss. The wheels have to be in the right place too, and spread apart just enough so that steering is easy, and that efforts don’t tax the drive train, or make riding at speed unpredictable. More than anything, it’s about controlling the light, not the heat.