internal halyards

Long story short, mast is down, no messenger lines installed, halyards are internal.
Before I go buy a roll of piano wire do you think pushing piano wire down the inside
of a mast is going to work as a messenger? At the mast head there are individual holes that the halyards go through then over the sheaves. I thought of using an electrician fish tape but that radius bend from the sheave to the hole is pretty sharp.