Thanks to both of you. Sounds quite straightforward. I am planning go to take the mast down Friday to do the work.

:: What Tom said.

:: I'm doing this project right now. I'm naive and sorta
:: frugal and picked up sale-priced Dyneema SK-75 in 6mm.
:: Warpspeed is covered (looks & feels like double braid
:: line) and much nicer. A horse hairs' width of this high
:: tech stuff is probably strong enough, but your hands
:: will want at least 1/4" or 6mm.

:: For the sheaves: I found matching the width more
:: difficult than other dimensions, so I ended up with
:: sheaves smaller in diameter than the originals that
:: probably violate whatever the recommended
:: line-size-to-sheave-diameter rule of thumb is. Next size
:: up was too big. I got the little white delrin ones at
:: Svendsen's, about $3.50 (x4). Steve Seals probably has
:: something better.

:: Cake project if your mast is down.
::
::
:: :: 1/4 warpspeed,
::
:: :: Steve Seals or Svendsens has sheaves,
::
:: :: Easy to do if mast is down.
:: ::
:: ::
:: ::
:: :: :: Hi,
:: ::
:: :: :: I need to replace my main halyard. NOW. It is currently
:: :: :: wire and I want to switch to line. I have a few
:: :: :: questions. What line should I be using? Is a replacement
:: :: :: sheave easy to find?
:: ::
:: :: :: Lastly, is this a reasonably easy DIY project?
:: ::
:: :: :: Thanks in advance for the advice.