Ah, cool, than we need to change some variable names according to this definition. I will point out some places.

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We don't need all three sliders at the same time. My idea of the UI is to allow two setups: 
1. Classic Setup: Pitch control + Keylock button: rate slider + keylock (switch rate to tempo slider)
2. Harmonic mixing Setup: Two sliders: Pitch slider + Tempo slider.

I don't like the UI from the test skin, It just confuses me, because it mixes 1.with 2. = Rate slider (labled as pitch control) + Pitch slider (without lable)