I submitted a lengthy post, tried to edit it and ended up posting it twice so I tried to delete one of them but could only reduce one in size down to the number 1. I received a very informative reply but now see that my original post plus the answer are no longer appear.
I guess I'll give it a couple of days and try again.
Never mind I now see that the original and the reply are still up.
Sorry for the confusion.
current skis: SES Ultra. sculling boats: Fluidesign Lwt, Wintech, Empacher.