Could be that the hop sludge that got through to the fermenter has caused the funky smell. Let it ferment out and give it a taste. If it's nasty, chuck it and give everything a deep clean. It'll be better next time :D
Could be chlorine in your water, or a chlorine based sanitiser that didn't get rinsed off, rather than an infection.
Did you treat your brewing water with half a campden tablet before starting?
30% attenuation after less than a week at a low temperature sounds sorta normal to me, I could be...
I got plastic, because they screw onto plastic. My thought process being that I didn't want to overtighten a metal carb cap and ruin the lid of my fermenter.
I really like mine and might buy a second one to go with it. It keeps hoppy aromas in, and you can do room temperature lagers and turn them around in a week without issue. Pressure transfer to kegs is very simple and quick, and your beer is nearly carbonated when you're kegging so no need for...
No worries man, that's what we're here for acheers.
For all grain, you need to factor in grain absorption and boil off. Absorption is normally between 0.5 and 1 litre per kg of grain and boil off is between 2 and 4 litres per hour. It's system / grain bill dependent so start with the standard...