I use a 55lb wing for HP100s in salt water with a drysuit and 200gm thinsulate undergarments.
I have used a 40lb wing with AL80s (same garments) and it was totally adequate. Of course those tanks are only -1 when full.
Whether a 40lb wing is enough for HP130s I dunno, I don't have any. But it seems unlikely to be a good match. Mostly 'cause with 8" diameter tanks you can easily use a larger wing and not have a huge Manta on your back.
I have used a 40lb wing with AL80s (same garments) and it was totally adequate. Of course those tanks are only -1 when full.
Whether a 40lb wing is enough for HP130s I dunno, I don't have any. But it seems unlikely to be a good match. Mostly 'cause with 8" diameter tanks you can easily use a larger wing and not have a huge Manta on your back.