Just had my sail repaired and the repairer removed all the batterns to replace a panel.

Should I put all the batterns in under light tension then tension from

the top down
or
Bottom up

or all with equal tensions and then do a final tune?

equal tension. depending on how many battens you got, you may need to get anywhere from 4 to 8 mates to help you to tension all of them up at the same time.

music with an simple beat may help you coordinate the tensioning process.

Yes insert with a light tension then rig up. Tighten in any order you want, it doesn't matter.

As to final tension - it is like taking a quarter of a viagra - just enough to get the wrinkles out of it.

Batten - its a BAtten

B A T T E N

nip em up then start from the top, with the top battens only tighten to the wrinkle disapper and then the bottom battens need a little more, then saaweeeettt