Dont sacrifice the Dovo to being a pasted strop. These strops are as good as any out there imo. Cupping can be corrected without oils lotions etc by just massaging the leather between the fingers and as Tony says, by pinching the strop at the top till convex then maintaining that position with the fingers, you drag them down the strop. reapeat this a few times till it holds the convex shape. Give the leather another kneeding then buff the surface with the palm of your hand till a sheen becomes evident.
This buffing should be done prior to every use on any strop to warm the leather and pass on the natural oils from the hand to the strop. Draw will be increased the natural way like this without the need for this fashion for mink and neatsfoot oil.

Good luck to you

PuFF