Which modpack version are you using?

2.0.7.5

4 GT++ Multiblocks alternately have incomplete structure.
Ore Washer
Thermal Centrifuge
Amazon Prime
Energy Station

Once fix one Multiblock of them by rearranging, the others will have incomplete structure.

I test again.
I build those 4 Multiblocks in 2.0.7.0, they can run perfectly.
Then, i update to 2.0.7.5. Those Multiblocks can still run.
But when i break one casing, replace this casing again, the multiblock still show "incomplete structure"