Oh these doors! They are not really hard in any way, there are just a lot of steps and undoing what you did and then adjusting and re-doing it again.
12/3/2020 Finding the perfect GAP for the door seal
I am using the McMaster door seal with the attatch flange width of .25 and the bulb diameter of 3/8. The part is : 1120A411 Water- & Weather-Rst Rubber Push-on Seal with Bulb on Side, Hollow, for 1/4″ Edge, 3/8″ High, 50 ft. Length .