Got 'er done, that's the important part. About the only thing I might have done differently is to change the location of the guide bushing. I'd have put it behind the cutter instead of in front. I would have bored in a short distance to finished size with a short bar, (just long enough to get the cutting tool and the guide bushing behind it in) then switched to the long bar. Then bored to final depth. Kept an air blast going to ensure no chips got between the guide bushing and the finish. The chips would have been able to get out the end that way. Also you know you're generating a straight bore that way, since the bar is guided by the freshly machined surface rather than the DOM tubing ID.
There are other ways too, but that's a good one.
Aaand I just noticed that this was from July of 2021, not 2022. Doh!