Local elder woman who was born in 1930's and has since passed...she said often that she never could understand why people crapped in the house and grilled food outside.
I installed the accurizing kit in my grandsons Lite.....and as others have said, it's not really difficult...just review volquartsen's directions thoroughly and some vids too...
If you are not comfortable, Volquartsen does the installs for $70.00.
I'd give it a shot...my TC Omega 50 cal. bp has an inch or so at muzzle end opened to remove rifling like you are wanting to do....seems to work fine for bp.
If it doesn't pan out, you could always go to plan B.
Can't believe you posted this in May and I'm just now seeing it.....
Thank you for taking the time to do the math, helps my understanding a whole bunch!