note: you have to decide when ordering a sail for a roller what height you want the clew. Cruisers who like to see under the sail order high clew, but if you are going to race at all you need to order the clew as low as possible ... and you still won't get a deck sweeper. So OK ... Bill Rhapsody was sailing with us a couple of weeks ago and mentioned using a Tack Shackle on the Harken. Which reminded me that I had picked up a couple from Ebay china several years ago, but the width of the tab on the Harken was too big for them. And the next size shackle up, the pin was too big.
Duh ... 5 min with a dremel ground them down just enough ... about .5 mm each side ... I have a second one to grind down for the top swivel.
for those of you surprised that I am using mm ... it is because it is a lot easier to use on a caliper than in.
And yes Wing on Wing works well on a J/30 especially when there are long arms.
This is a 155 jenny and would have no problem with the track for a 163.