Is it possible to stack a protostar?
Haha did you see that on that BST too? I dont remember whos it was. I was like "how can you stack a protostar?
Well, you’d have to basically break the little cap domes off.
Send me a Protostar with Grind Machine bolts and you’ll find out. 
I hubstacked a Protostar before too!
It played really heavy but it was ok I guess.
I think the Protostar wouldn’t be the same plastic beast with the extra noise and weight.