Adding radiator in one-pipe steam heating system

[johnmh]

Due to a remodel, I'm moving a steam radiator on my second floor. This involves a new 1" copper vertical riser from the basement, that rises vertically about 10 feet. I'm concerned that the condensate will interfere with the upward steam flow. Is there benefit in slanting the riser (I have 14-1/2" between the studs to allow for a slight slant). My thoughts are that the condensate would flow down the lower side of the pipe, rather than dripping rather willy-nilly throughout the interior of the pipe.

In order to do so, I might have to add one or two additional ells near the radiator, which may also impede the steam. Any thoughts on my logic?

Thanks