Uranium_Green

Yeah, that looks to just be the cover, the actual gas spring cylinder is rather thick (3mm steel) and typically doesn’t want to dent (due to the pressurised gas inside).

Though I’m trying to workout how you got a dent on that bit; normally the whole tap it with a rubber mallet is talking about the tapping the foot/wheel part, parallel to the gas spring

As silly as it sounds, depending on what you’re wanting to mount you may be best off just either putting some paper/toothpick/matchstick (without the head) into the hole so the raw plug is tight enough that it won’t spin as you drive the screw in. (Would only suggest this if its for picture frames or similar weight)

Out of curiosity is it plasterboard or brick that you’re trying to mount to?

Raw plugs shouldn’t spin freely, you should need to gently tap them in with a hammer/wooden block/back of the drill, often its better to use a slightly smaller bit (9.5mm) particularly as the hammer drill setting will often make the hole just a tiny bit bigger or if drilling plasterboard as its so easy to make the hole too big

Out of curiosity, have you come up with a reason why it tasted so tree like?

What colour did the mead end up being?