Is there any down side to mounting the bag on the parallel link so you have a 2:1 lift or say 1.5:1 lift or is better to mount it on the axle for a 1:1 lift?
Thanks

Any ratio will put added stress on the bars, that's about it. If your bars are beefy enough, it shouldn't be a problem, but if they are weak, they have the possibility of bending.