Thanks @fanfare and @dmertz
After thinking about it some more, I think I will go ahead and convert the remaining 0.20. I have no plans of doing future traditional IRA contributions, except in years where I am not qualified for Roth IRA contribution.
And although 0.20 has no effect on the return, I like to keep things clean and simple (i.e. having less boxes on my 1099R).
