Looks great, I got one similar a few months ago, I found that sealing all of the corners and seems with some food grade, odorless silicone really helped maintain the RH, you can pick it up at lowes, home depot or even pet supply stores that have large fish tanks, it should help hold the RH and your Oasis won't run as often / be a bit quieter.
To quote the Frank's commercial, "I put that **** on everything!".
Again, looks great!