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There's a new pull request coming for BTS Tools: https://github.com/wackou/bts_tools/pull/36

Currently, BTS Tools uses an amplitude of 1/3 (33.33%) which needs changed to 0.14 (14%).

That's done. Not sure who is closer to the right price myself and blckchnd or roelandp:
Screenshot at 2018-01-14 15-13-43.png