Been doing quite bit of changing sights lately. Sight pushers?? Well if you have lots of money to throw around fine. You really do not need to. You need to use a non marring punch--nylon or brass. I prefer brass as you can use Triple 000 steel wool and oil to clean brass off your steel sights you remove and install. You also need a small metal head gunsmith hammer to get them rear sights to start moving. I also recommend some blue painters tape and mask of your slide around your ares where you will be working. In case you have a oops. I can not stress enough to have a firmly attached pretty good sized vise and the right tools. a small whet stone or a set of small files to fit those rear sights. Take a small bit off, take your time and test fit repeat till you think you can get it centered without killing the sight. Remember those tritium vials can break with a lot of heavy hammering. Really this is gunsmithing 101. Hope this helps in your endeavors.Looking at slide from rear I remove the rear sight left to right and install right to left. I use pieces of leather to pad the jaws of vise to cushion the slide. For a CZ 75 I have been using a slide fixture made by Eemann Tech use e bay to purchase. It is slick, run your slide into aluminum fixture and tighten in vise.
My Dad worked under an Army Armorer in WWII. He was a Millwright in civilian life. He taught me. Have done mechanical work all of my life.
A high quality sight pusher costs less than a fraction of the tools you require. There is also far less danger of damaging the firearm OR sight. It is understandable that those same tools can serve well IF a person wants to broaden their DIY gunsmithing.
Hats off to your acquired knowledge and skills. It can be easily overlooked the expense of the tools and equipment we accumulate over the years.
Have personally seen the slide of a fine Kimber AND new high grade expensive night sights damaged. All from the owner attempting the job. Have sadly seen others over the years.
One time users can be well served by using a qualified Gunsmith.
Or, around my area one guy in the group of shooters has a sight pusher and shares.
That's how they discovered the cheap sight pusher simply falls apart.
Word has always spread in the gun community. Even before the internet.