I have the clawhammer 10 gallon still-
The condenser arm works fine for me- I’ve never had any issues with vapor not condensing back into a liquid. I don’t use a pump- I just hook a hose from my faucet to my condenser (the lower tee is in, upper is out) and a put it on a slow trickle– you don’t need much flow at all. You might want to put valve after the pump so you can adjust the flow- You don’t need much flow at all.