Step 1: Location
When putting it on the inside you have to be careful not to have anything lined up with the inside shelf. A door isn't much good if it won't close. :-)
The first step was to hold up the tablet to mark a general location. At this point I was only concerned about locating the bottom edge. I used a straight edge to identify a level line and marked the location for the bottom two supports, spaced about an inch inside each corner of the tablet.
Step 2: Make the Bottom Supports
I used half a pack of Sugru for each support. Mush it up, press firmly into position and shape as desired.
After I had the general shape I removed the straw and held the tablet in place to verify the thickness.
A little reshaping was needed to ensure the tablet would sit well in the supports. The fit in the bottom ones is critical to keep it from slipping out and hitting the floor if you bump the door.
Let it cure till the next day.
Step 3: Top Supports
I used half a pack of Sugru for each support. Mush it up, press firmly into place and shape as desired.
Let that cure for little while at least before removing the tablet. I stuck some straws in there again to ensure the top supports didn't droop too much.
Let it cure for a day.
Step 4: Enjoy
Now I get to watch some Netflix while I'm cleaning up, doing dishes, or cooking.