It is Zephyrwerks with an "e".  Located in Pt.Townsend, WA.
It is handy to know the OD and ID and width at the hub of the sheaves you are 
planning to replace.  Also let Tom know the rope diameter you plan to use.
Replace the sheave pins (axles) if the old ones are scored or hard to remove.  
Running new sheaves on damaged or worn pins will lead to premature wear of the 
new components.
Chuck Gilchrest 
S/V Half Magic
1983 35 Landfall 
Padanaram, MA

Sent from my iPhone

> On Nov 13, 2016, at 12:21 PM, Derek McLeod via CnC-List 
> <[email protected]> wrote:
> 
> Indeed the headsail was shorter than the one it replaced and this led to the 
> wrap. I had a wire pennant made up to sort that. No wraps since then. 
> 
> I'll take a look at zepherworks. 
> 
> Any line that I should look at for this? I have little knowledge in that 
> realm.  
> 
> Derek McLeod 
> Aileron, 1983 C&C 29-2
> Toronto
> 
>> On Nov 12, 2016, at 7:32 PM, Josh Muckley <[email protected]> wrote:
>> 
>> I switched to all rope halyards and haven't looked back.
>> 
>> Your sheeves at the top are probably 'V' shaped and can box the rope 
>> halyard.  That is the least of your concerns.  There is a chance that they 
>> are chewed up from years of service with a wire rope.  Zepherworks.com is 
>> the place to go for new ones.
>> 
>> Additional if you had a wrap on the furler you need to find out why.  Wraps 
>> usually only happen because the halyard is leading to the furler swivel at 
>> too shallow of an angle.  The halyard may have been removed and re-fed 
>> incorrectly.  It is also possible to have a headsail that isn't hoisted all 
>> the way or has a short luff.   Even sails with too short of a luff can be 
>> flown as long as they have a tack line added to allow full hoist.  Otherwise 
>> the halyard angle becomes too shallow.
>> 
>> Occasionally I'll have a brain fart and not pull the spinnaker halyard back 
>> to the mast when I'm trying to furl.  The spin halyard gets wrapped quick!
>> 
>> Josh Muckley
>> S/V Sea Hawk
>> 1989 C&C 37+
>> Solomons, MD
>> 
>> 
>> On Nov 12, 2016 7:16 PM, "Derek McLeod via CnC-List" <[email protected]> 
>> wrote:
>> Hi,
>> 
>> Anyone have experience going from wire/rope halyards to all rope? One of my 
>> two wire genoa halyards got twisted around the furler this spring prompting 
>> me to want to replace them.
>> 
>> I gather I have to investigate the mast sheaves to see if they are 
>> appropriate for the job. On the cabin top I have 2 double Lewmar clutches on 
>> each side. The only marking I could find on them is 9.5-12, which I assume 
>> is the line size range in mm. From what I have read, if I use a smaller 
>> dyneema line, it can be bulked up in the clutch area. Any other tips or 
>> considerations?
>> 
>> Thanks,
>> 
>> Derek McLeod
>> 
>> Aileron, 1983 C&C 29-2
>> Toronto
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