I finally upgraded my solo lottery machine from an S3+ to an S5, the trade of 50% more power for 200%+ time the hash was well worth it. My friend is 3D printing my fan ducts and upper and lower covers, but I did a few things in the mean time to hold me over. It is in my laundry room that isn't being used right now, so noise really isn't too much of a concern, but I lowered the fan to 60% and it dropped 4dB (70dB to 66dB) and runs at a steady 1.15TH @ 53.5*C.
I folded up some tin foil and closed off the bottom of the unit.
I ordered a fan duct off ebay so that I could focus the exhaust out my dryer duct.

I'll adjust the height of my shelf better for the final setup, but for now I just angled the S5 slightly to get the ducts to line up.

All buttoned up. The final setup will probably use the insulated tubing to connect the S5 to the vent and see if that makes it quieter as well.

I also have an brand new
Delta AFB1212VHE in a drawer that I can use as a pull fan and lower the fan speed further for a few more dB as long as I don't oc it.