Can anyone remind me how long my 2:1 main halyard needs to be?

assuming a standard size rig 5720 x 2 + a bit for the rest on the mast.

13m ought to do it.

oops 2:1.

5720 x 3 + a bit for the rest of the mast. 19m should be about right.

Thanks very much!

Hmm, while im doing this

Any clues to Spinnaker sheet length?

best bet is to ring Speeds, P&B or Sailsport and ask for some merlin spinnaker sheets. Assuming your fairleads are in the normal position and not aft of the helmsman in which case you'll need them long enough to lassoo a whale!

That is no way to talk about Adam (or was it Ben)

Sorry - That should have been Richard (or Ben)

Well, whaling quotas are getting smaller so i downsized!!