I managed to put the bottom of my car door though one side of my luff sleeve. It looks like a pretty solid area that might be hard for sail maker to fix. Thinking of just sailing it with tape, unless it's likely to extend the tear.
It depends a little on where it is, I think. If it is just on one side of the wide luff and the main, central part, of luff is undamaged, then I think tape will do fine. The wide luff itself does not have much tension, it is only there to guide the wind, while all the load is taken up by the central luff part.
I think Manuel7 is the one who pointed out this tape: www.ebay.com/itm/303500115529
Nice if you feel either to be matchy or feel like you need a bit of extra strength
thanks
found that tape on amazon too. hopefully no one else needs it 
www.amazon.com/Nautos-PSP-Tape-Kevlar-Repair/dp/B07896RH69?ref_=ast_sto_dp&th=1&psc=1
I've found that the kevlar repair tapes don't seem to have the adhesive qualities of dacron stickyback. Dacron stickyback (not lightweight spinnaker repair tape, but the heavier grades that come in about 1m wide rolls) is amazing stuff even when sticking offshore racing yacht sails back together.
Others may have had different experiences, but the stickyback is certainly my preference.
I used that type of tape in the past with luck, but yes the adhesive can be stronger. What I found foolproof is this 8mm transparent tape from chinook isthmussailboards.com/chinook-sail-repair-tape.html does not brake and the adhesive is very strong. There is also this isthmussailboards.com/monofilm-sail-repair-kit.html that might be best given the damage.
Gorilla Clear UV stabile tape for X-ply (invisible, and does not change color/fade), and Gorilla Ducktape (various colors) everywhere else. But you could use the Gorilla Ducktape on X-ply, it is the stickiest.
Get a proper mylar repair tape (clear).
The gaffa and other duct tapes are not suitable for sail repairs, or anything else than something very temporary. They age quickly and leave a residue on the sail, this will in turn cause problems for the needed proper repair...
