holga in the digital world

I recently purchased a Holga lens, made for Nikon DSLRs.  It's a great concept and my love of Holga (and hatred of ruining a lot of rolls of film) made me interested to see if I could pull it off.  I'm not a huge fan of huge vingnetting or making a digital photo into something "vintage" and I wanted the results to turn out classic, as if I was shooting Portra 800 film (thanks VSCO).  The HL-N lens fits on nicely but it has a very defined flower pattern unfortunately.  Today I modified it for less vignette  but at a loss of sharpness.  Time will tell if I'm fully happy with it.  The photos are pre-modification and some post-modification, taken around the neighborhood.