I have only tried a single infusion mash with millet once and the results were sub-par to say the least. I mashed at 160 F for 60 min. According to the article I should have mashed longer but it also says in step 4 to add alpha amylase enzyme to the mash along with the strike water. I did not...
It looks like the gas coupler is threaded so you will need hose barb fitting to attach the gas line to the coupler.
http://www.midwestsupplies.com/barbed-swivel-nut.html
You will also need a regulator, CO2 tank, air hose, and 2 hose clamps.
I usually do oatmeal when adding coffee. I add the coffee to the kettle at flameout, I also use a bazooka screen in my boil kettle and this helps to filter the grounds out of the wort.
I recently started experimenting with smoked beers and so far I have been using about 5 to 8% smoked malt in my recipes. The next smoked beer I'm planning on making is a Golandsdrika for which I have seen recipes using anywhere from 5% to almost 100% smoked malt. Has anyone here brewed one...