My Novak GTB is a great speedo, and has been fault free all season. The only downside to the GTB is its size and footprint, which is mahoosive!
I know the early GTB's didnt include Li-Po cutoff but they now do, so that maybe why people are selling them on ebay.
There have been stories about the GTB's giving massive interference, but with my Losi XX4 with graphite chassis, I never had a problem.
Cheers
Mark
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