Hi Brian, re: checkbox positioning, it is possible to change that one checkbox's position by putting this in the head section of your _CycloidTrochoid.htm file:

		<style>
			#ignore_bRadius {
				align-items:flex-start;
			}

			#ignore_bRadius .checkbutton_box {
				margin-top:0.2em;
			}
		</style>

- Michael