I would go with the 220k. (1/2 watt is perfect) If its tooo much intensity and you can't manage it with the knob, then you can try to increase the bias like I did. Increasing the power tube bias too much and the trem will completely disappear. I went with a 220k 1/2 carbon comp I had and bumped the bias up from 18mA to about 21mA per 6V6. Nice results. At 18mA it was too deep and started to somewhat resemble a choppy BF-style roach trem. Still haven't found time to make a clip yet....its coming though. I promise!