# Custom Configuration

**URL:** <https://discuss.bluerobotics.com/t/custom-configuration/9376>\
**Category:** ArduSub\
**Tags:** ardusub\
**Created:** [March 30, 2021, 10:19am UTC](https://discuss.bluerobotics.com/t/custom-configuration/9376 "2021-03-30T10:19:50Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Enes](https://avatars.discourse-cdn.com/v4/letter/e/e36b37/32.png) [@Enes](https://discuss.bluerobotics.com/u/Enes)\
**Post date:** [March 30, 2021, 10:19am UTC](https://discuss.bluerobotics.com/t/custom-configuration/9376/1 "2021-03-30T10:19:50Z")

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Hello,  
Why Throttle Factor the third and fourth motors are same but fifth motor is different? 3. and 4. motors throttle factor’s sum is 0.9 but 5 is 1?

 ![discuss_customframe](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/b/b6fb0ba89f4da85252c40642e9a4487fce9a123d.png)

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**Author:** ![williangalvani](https://avatars.discourse-cdn.com/v4/letter/w/6f9a4e/32.png) [@williangalvani](https://discuss.bluerobotics.com/u/williangalvani)\
**Post date:** [March 30, 2021, 1:03pm UTC](https://discuss.bluerobotics.com/t/custom-configuration/9376/2 "2021-03-30T13:03:02Z")

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I’m not sure about this, but maybe so the overall thrust is the same in the front and back of the ROV?

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**Author:** ![Enes](https://avatars.discourse-cdn.com/v4/letter/e/e36b37/32.png) [@Enes](https://discuss.bluerobotics.com/u/Enes)\
**Post date:** [March 30, 2021, 10:35pm UTC](https://discuss.bluerobotics.com/t/custom-configuration/9376/3 "2021-03-30T22:35:39Z")

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This is the [ardusub](http://www.ardusub.com/developers/developers.html#making-a-custom-configuration) document. Could the tether be cause? I think, tether pull back the ROV so front throttle should be bigger than back throttle. Is it relevant?

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**Author:** ![williangalvani](https://avatars.discourse-cdn.com/v4/letter/w/6f9a4e/32.png) [@williangalvani](https://discuss.bluerobotics.com/u/williangalvani)\
**Post date:** [March 31, 2021, 1:11am UTC](https://discuss.bluerobotics.com/t/custom-configuration/9376/4 "2021-03-31T01:11:27Z")

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Throttle factor is actually for verticals. so the idea is that you have the same vertical force in the front as you have in the back (assuming the frame has a similar square shape as in the drawing).