This is how I checked the gap for my oil support rings on my LS3

As the title says This is how I checked the gap for my oil support rings on my LS3 haha
Hastings Piston Rings 2M5292020 Engine Piston Ring for my 4.085 bore

[@AustinC-cr9dm]

why not use the piston upside down to push em in?

[@Dookamonnnn]

I tried using the piston, but I could not get it to square up consistently the was a bit too much side-to-side play and for my first time I didn't want to continue with it. I had 3 other methods to use, so I didn't stress it. I designed a 3d printed squaring tool for my bore size, I had a roll of painter's tape that fit perfectly, and I bought the tool you see in the video from amazon.