i have the curse of being able to always upgrade my builds a few days after uploading them; here's the v2! even more proud of it :D

correct me if any of these timings are wrong, i'll gladly correct them
opening time: .75s (0.9s seamless)
closing: .75s (1.05 seamless)
dimensions: 7 wide x 15 long x 10 high
total: 1050 blocks

the first download link will download a map with just the door itself in a void
the mega download link will download the NBT file which you can then summon in any world, anywhere, with a structure block (there are many tutorials online on how to do it if you're confused)