This year's Sphere of the New Era is not stacking with last year's. They seem to have the exact same function, except the graphic is different (is that why they don't stack?)

Thanks,
Toonela, 316 Kronyn Excavator

yep.. that would be it... if he used a different graphic for this year's and the one from last year has the old graphic still, then he created a totally new item... being a totally new item it is not the same as the other one....

...it's like... trying to stack a Tri-phase Upgrade with a Tri-Phase Cutter...

You can extract those?

yes, all upgraded buildings can be extracted and become a standalone arti, seperate from the upgrade arti

sha'jha, hypergate, tri-phase
(am i missing any?)