There's a glitch with the Pile of Goop where, as far as I've tested, only occurs when it collides with a Golden Stopwatch. It's like holding down the 'N' key on the Golden Stopwatch item. Is this intentional?
There's a glitch (well, not sure if it's a glitch) where you can weld multiple upgrades onto one weapon through the pause menu. Like, I just put four drum magazines on a Gatling gun. Was this intentional?
Yes. You can also customize the attachments' Force via the Detail Tool in any case, making even a single attachment as powerful as the four drum mags would be.
 "Mutilate-a-Doll 2"){kind=icon}
It bleeds.