When can you safely go back to the Roman numerals?

Why should he?

I was going to say I'll switch back in a few weeks when I reach set 140, but
since the set numbers are meaningless anyway, I'll just skip ahead to CXL
next week.

What on Earth for? Actual numbers are much more readable.
--
Mark Brader | "It can be amusing, even if painful, to watch the
Toronto | ethnocentrism of those who are convinced their
| local standards are universal." -- Tom Chapin