I appreciate that these things are old hat for you epoxy and carbon driven individuals but I still like to use them on my Lark.  They are of course regretably no longer available new - and hence my plea.
I have no shame at using your cast offs and would appreciate it if you would rummage round in your draws and see if you have either of the above surplus to requirements.  Cash and/or my wife's recipe for Lemon Meringue pie available for the right bits.

Thanks for your help (said he hopefully...)

Chris, I've added your post to the CVRDA forum as there's a chance someone there may have such an item.

hello chris.

Chris,

Not sure if it's what you're after (?) I have an old mast ram (multi-pulley under foredeck type) 

Colin

Thanks Pat and hello Mark (I won't ask how you ended up with a four piece Chipstow mast...).

I am only interested in screw type but thanks anyway.  
The Mighty Strut is the ideal solution but my last one I made from a Mighty Screw (the deck mounted version, kindly donated by Peter Scott) and some spinny pole offcuts.

Don't know if this will work but this is what I'm trying to achieve:

[IMG]http://i48.photobucket.com/albums/f203/pedrollo/2495foredeck.jpg[/IMG]

Have you thought of the style of fitting that an RS400 uses as a deck control (its a knurled wheel)

you must be the only lark out there with a highfield lever!

I thought of the RS400 but their system is different, the threaded part is fixed to the mast (doesn't rotate) and the killer is that for it to work you need to sandwich the adjustment wheel.  The Mighty Screw is much easier & neater when you are starting with a flat deck.

Mark, the Highfield sets the mast rake and the adjustable shrouds the tension.  Not exactly a one string system but an awful lot less rope!
There will be at least two as 2515 will have the same set-up.

Make that 5 as all our clasics have highfields!

Screw or strut, today of all days, we might all wish for a mighty one.

I had hoped for a single red halyard but I imagine that all there will be is a lousy card!!

Chris, if you can’t find a mighty screw you could try looking at a plain bottlescrew/turnbuckle, link below. 
You'd have to construct a wheel or carry something to use as a lever. Also, I think the mighty screw may have a finer thread making it easier to adjust. Spreader adjusters are similar but would probably not be up to the job or have a big enough range of movement.

I'm pretty sure the turnbuckle on the P&B site is designed for standing rigging and to be in tension, so putting it in compression resisting the forward bend of the mast is most likely going to bend it.

Thanks PaulR, I have done that in the past (using an old Hoover wheel stuck to the centre and pinned through the hole) and, if all else fails, will do something similar again.

The loads are tiny compared to what they are designed for and they do hang together OK as long as you don't over extend the threaded parts.

I am still hoping to find an old strut though...

What's wrong with either a lever strut or the Z Spar track operated strut? If you don't want rope adjustment to get in the way don't lead it back. The Z spar one could cleat on the mast, the lever under the foredeck and both are readily available.

Chris, Larks are restricted in how high up the mast you can go with a strut so there is no space for a track system.  Levers use the space where the spinnaker goes, the new design has a relatively narrow channel down the centre and not the full foredeck width that we had before.  Not impossible but potentially expensive in spinnakers.

The screw is by far the neatest solution I have ever found, if only I could find one.  It will probably end up being a construction from a bottlescrew again.

Hmm, i suppose the deck isn't strong enough to take the track loading? I've seen fireballs with the track on the deck.