That's a good approach for 2 kegs, but I have 24 in my rotation, so it would be much easier to trim the plastic in the fridge.
I don't know of a slightly smaller fridge.
I do know that my kegs won't quite fit side by side in my beer fridge. I could have trimmed interior plastic from the fridge, instead I trimmed rubber from the edges of the kegs. The top and bottom rubber flares out where it laps the steel. I used a drawknife to shave it down. Most people don't own a drawknife, a sharp chisel or razor scraper will likely be fine. I only shaved the edges at two opposite points on each keg. Now they squeeze in.