How to make Supports : Use Loft?

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1

I’m creating a box to be 3D printed for my TEC-TEC-1G project. I have some mounting holes for the PCB and under these I want some supports. Managed to get those, but now want to add extra bracing/webbing so make those stronger. In the pic below, I was hoping to make it basically a cone shape, with the circle I’ve drawn and selected to be the base of the cone.

I tried using the LOFT tool, even watching some YouTubes on how to use it, and it simply does not work, with an error appearing saying it wasn’t valid. (I was selecting the big circle on the bottom of the box, and the circle at the top of the support)

Is there a better way to do this? Happy to watch some YouTube on a specific tool if you can give me links or point me in the right direction.

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TIA.

2

Loft without the hole first and put hole after.

3

Deleted the hole… Still the same error.

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4

Make it like this.

Just 2 simple circle sketch and loft.

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5

Also you can use chamfer for that.

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