I'm curious, why the desire to change slides on a Glock? What is gained? Not asking from a judgmental point, it's just that in my line of work, you use a completely stock firearm without even bbl swaps such as 40/357. Whatever is listed on the slide of the stock firearm is the caliber used.
That said, in a non-work gun, have fun and do what you want. From that point, I'm just ignorant on slide swaps.