Add an optional limited upload after full download

Currently FDM has an option which I can seed unlimitedly or up to a preset percent of every individual torrent/magnet [100, 150, 200, 300, 500 & 1,000%].

Besides that option, I'd like to suggest another seeding option.

While I'm downloading a file, I can seed [upload] that same file at any speed rate. However, once I have 100% downloaded that file, I'd like FDM to limit the upload speed at 75%, 50%, 25%, etc of my upload bandwidth or of my previous speed rate.

This way I can seed any recently downloaded file —all the time I want to— without worrying about my global upload speed.