NIH page is not live so I can't look at it carefully - but set up for customizer, control all major parameters (diameter, length of coil, diameter of coil, length of tube ) - and if you really want to kill it - look for all the standard fittings for both fluid channels and have those selectable. Last thing -- think a little about printability. What makes the most sense? - e.g. give up a rounded edge on the back side so it can print with the two current side fittings facing up.-- Joshua Pearce (talk) 10:42, 1 November 2019 (UTC)