I have purchased 3 sets of 3 leach tails for the mainsail question is do I arrange them as the pic suggests or do I just stream one long one back to back ? Each packet contains 5 triangle stick ons and 5 ribbons . Some what confusing. Has anyone experienced this with Ronstan RF4026 purchase?

ummm, 3 sets might be overkill. Normally you would put one just below each of the top three battens.

You might want to trade in two of the sets for woolies that you can place along the main at about 25%, 50% and 75% from front to back at about quarter and half height.

Thanks , I just wanted 3 ribbons for the leach as the previous ones installed on the battens pockets have all gone wrapped on lazy jacks by previous owners. . The eBay cart didn't confirm 3 in the purchase so I ordered X 3 turns out each set of the purchase contains random amounts of ribbons and self adhesive patches. A Chinese common problem I'm seeing regularly lately. All good I will just attach 3 ribbons above the battens and have plenty of spares on hand ! ??

Try to stick them so that the ribbon ends up central, not stuck one side.
If you have enough sticky things use one each side with ribbon in the middle.