I can't believe nobody has mentioned how good the GB3 is. It's a much stronger version of the GB2, so when you're in the oil a bit more, it still carries very well, and does a good job of picking up the slack of an IQ. Between it and a Hyroad, not much more is needed for a THS unless they get really fried, but when the track burns up I like to grab the GB3 and move into more oil. It's not a big ball like a Sure Lock or Rip'd, but just right for house conditions. I will say too that the X2 is right there with it, so either one should be a good choice for a less lazy IQ.