Dropeed my first RCBS 5-0-5 on a concrete floor about 15 years ago. Kept using it but didn't trust it, so replaced it with another 5-0-5 which is still in use.

I did baby this new one a bit and boughtan RCBS dust cover. It stays under that cover when not in actual use. I don't know if dust can get under the pivot area or not but figure it doesn't hurt to keep it clean.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!