Request for auto-delete smaller files

[codereptile]

I have recently ran into a problem, where I had about 4000 groups of identical images. This was caused due to one of my applications on PC creating a smaller preview file for every picture. Obviously, grinding through several thousand groups is not an option, so a there could be a feature 'delete the smallest file in every group', which would delete any file in the group, if its, say less than 50% of the largest file. I would love to see this feature, and it loos as if it isn't to hard to create.