The question can be extended for 1199/1299/899 and 959 as it's the same tank. All Steel (except the 1199r ally tanks), which might help you get some more opinions
just so happens that I have a DP Panigale tank bag coming up for sale. Used once to go TT last year. PM me if interested cheers
Update - I contacted SW Motech as I was quite keen on using a tank bag which doesnt touch the tank to avoid damage to the paint. SW Motech produce a tank ring for the V2 (its not the same as any other Panigale models) which enables you to use a Tanklock tank bag. Here's a link https://www.motohaus.com/evo-tank-ring-black-tank-without-screws
Thanks Bought the evo tanklock & bag from sw motech fits works on my v2 dont like rucksacks too hot - now have small carrying capacity looks ok without bag as well