# Invalid result body using shell tool

**URL:** <https://discourse.shapr3d.com/t/invalid-result-body-using-shell-tool/7071>\
**Category:** Modeling Questions\
**Created:** [April 2, 2020, 9:06pm UTC](https://discourse.shapr3d.com/t/invalid-result-body-using-shell-tool/7071 "2020-04-02T21:06:13Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Gelphyn](https://avatars.discourse-cdn.com/v4/letter/g/db5fbb/32.png) [@Gelphyn](https://discourse.shapr3d.com/u/Gelphyn)\
**Post date:** [April 3, 2020, 7:45am UTC](https://discourse.shapr3d.com/t/invalid-result-body-using-shell-tool/7071/5 "2020-04-03T07:45:22Z")

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@ps23Rick  
During sleep my mind often gets ‘raked over’, like gathering leaves into a pile to reveal what may be lying on the ground.

This is an altered Base Profile used in used in my ScreenShot above, with **Sketch \> Offset \> Loop** applied and of course you can set the Offset measurement as required, The Height of the Inner Body is 300mm and the Outer Body 305mm, in this case:

 ![IMG_1695](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/0/0e520386427bb4f3d647ec37d780665126043213.jpeg)

The beauty of this is the accuracy of the result.  
However as can bee seen the ratio is close to basic, and height increase becomes a significant factor to consider. The Draft Angle refuses to be set beyond, as yet, undefined limits.  
So Experiment is the Key to success.

Credit is due to @GiddsV in:

[https://discourse.shapr3d.com/t/why-i-can-t-shell-this-loft-object-please-help/6621/7](https://discourse.shapr3d.com/t/why-i-can-t-shell-this-loft-object-please-help/6621/7)

For introducing this possibility to me.

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