try portal/gravitygun?
tried it, it is impossible to move an end portal with portal or gravity gun.
I went and looked for one creatively in my testworld, tried to move the blocks before and after the eyes were inserted. Methinks the guns have been coded to not allow movement of endportal blocks.What about just moving the frame before it is turned on? If it just meta data on the block you should be able to move the frame block by block to a new site then put the eyes in and have it create the portal.
I think the reason and the same reason why creativly building one fails is there some extra data in there.
You can build an end portal in creative mode. You want to build it whilst standing in the middle (so you place the blocks outward), which is the key to the building process for some strange reason.
You could always make your own portal with Mystcraft
You can build an end portal in creative mode. You want to build it whilst standing in the middle (so you place the blocks outward), which is the key to the building process for some strange reason.
Tell me if that works, or if you need more data.
Thanks... Ok it seems that the issue is this does not work in a custom flatland map. but works perfectly fine with a normal vanilla world set on creative.
I was able to create an end portal using the same method in both a standard flatland map, as well as a custom one (dirt layer removed from standard flatland map).
Note my correction about corners.