Eric
I will measure the throws next time I get it out, I have not had a problem with binding yet but will check my whole set up, and yes with the crow deployed the flat spins or blenders as the US call them are very slow, I am interested have you your crow in towards the fus or out from the wing, I have tried both and its intersting to see the difference.
I fly at Conya Marshes near Faversham, you will be interested to know that West Malling aerodrome is now a housing estate, I used to fly there with the ATC before I got into serious competition gliding, at one point I got quite concerned when I realised that the thing I was up in cost more than my house.
What's the twin your going to use the 61's in?
If you where slope soaring in the 70's we posibly know some of the same people, the local area BMFA Chief Examiner is always going on about when he and a few others invented PSS I think on the Ditchling Beacon and Devils Dyke, his initials are MG don't want to put names on here for obvious reasons, if it sounds familier send me a PM and I will put you in touch with him.
Oh by the way "What is the payload of a South African Swallow?" or do you have a "Shrubbary?"
Mike