hi wouter,

many thanks again for your intense support and help!

I think the difference in size we measured is based that we measured the distance by hoisting a rope to our current jib-topblock (which indeed is significantly several cm below the mainmastfitting) till down to where the spinnaker pole sits and measured the legth inbetween. we measured this distance twice.

i think (not sure I understood all your explenations, but will reread it with more time tonight) you top-solution might be difference... still your images are quite convincing...

anyhow, I think you can empty your floor again :-) as I don't think we need more data from your jib!

after seeing you fullbattened triradial cut mylar jib, do you think a crosscut dacron jib, not fully battened can also do the job [surely less optimal] or are all selftacking jibs fullbattened nowadays?

regards

dirk