Hello jakj. My friend and I were recently playing FTB with your mod added in. We were trying to create a large flying city (A la Laputa) but ran into a couple snags. Snag #1: Your mod doesn't seem to play nice with immibis's microblocks. The city refuses to move an inch if there is a single microblock touching it. Snag #2: Our city is big. We estimate it to be somewhere around 8000 blocks. Naturally we upped the block limit in the config file, but our game still crashed when we tried to move the city. However, after we cut the city down the middle in creative, each half was able to move alright on its own. Which gave me an idea to suggest to you. For constructs larger than, say, a thousand blocks (configurable), why not have them move in pieces, so the game doesn't crash? EG; If I wanted to move the city northward, the northmost blocks of the structure would move first, then the second northmost, and so forth, until all blocks have been moved one forward. This would take longer, and look a little silly I realize, but better slow and silly than not at all.
Thank you for your consideration, and your great mod.