All my CZ rimfires are in 22lr caliber.
I'm using a Leupold 2-7x28mm Rimfire in Leupold 11mm, medium height rings on the 457.
I use the exact same setup on my 455 full-stock. It suits me fine. It's just too bad they're no longer making them..
I tried the Leupold 2-7x33 "Freedom" Rimfire, but it's substantially larger and interfered with the front sight on both of the above mentioned rifles.
I put it instead on my 452 American (without sights). I used Leupold 3/8" , medium height rings. The bolt handle woundn't clear the ocular bell but a strip of black plastic cut from an oil bottle and set in the lower ring halves gave the clearance needed.
I have a plain-Jane little 455 Carbine also. I have a Leupold 4x Rimfire sitting upon it, also set the 11mm medium height Leupold rings.
And you are correct, but too late in warning me about the screen door. Many years ago I put a 400 grain 50cal pill through it from a muzzle-loader. The stench of burning sulfer lingers far too long, so my wife did not believe me when I told her a speeding hummingbird from one of her many feeders must have flown into the screen and made the hole.