Back in the mid-1980's, I bought a used Ram (Ramco) Bridgeport clone. It was made in Taiwan, had chrome ways, and was practically unused. The prior owner had used it in his shop that repaired farm equipment. I put it in my 3-car garage-sized shop, but never ran it because I didn't have 3-phase power and never got around to installing a converter system.
A couple of my friends started a machine shop, and I loaned them the mill to help them get going. They used it a little, and about five years later bought a real Bridgeport and returned the Ram to me. Again, it sat for years.
My friends had told me that the quill "bounced around" and eventually, I checked it out. The quill would move if you applied side pressure to it. I dismantled things enough to get measurements, and determined that the quill was fine, but the bore of the head was tapered, and about .005" oversize at the bottom end.
I finally got around to addressing that problem. I had the quill hard chromed about .010" oversize, and took the head to a precision machinery repair shop that honed the bore to match the quill. Now everything was tight.
About ten years later (I started a business, got married, and started a family) I got my electrical service upgraded to 3-phase 240 Volt. I wired up the Ram, and it works perfectly. In essence, I have a brand new mill! I recently bought a 3-axis DRO, and will be installing it soon.
So my Bridgeport clone started out as a crappy copy, and is now a perfectly good machine.