The Bic blade (recently arrived) went into the slim and it has given me some nice close shaves. Day #1 wasn't that smooth, could have been settings used (7,5,4), or the new blade. Changed to 5,4,4 for the subsequent shaves and it has been DFS and pretty smooth, not quite as smooth as the Nacet or Perma sharp blades, as they both seem smooth from #1.
A change coming to SE for the next shave week, or until my new eBay purchases arrive and get cleaned up!
Happy Friday
Gary