Design a holding jig from a stp file

[testjig]

Hi,

I'm trying to make a jig that would hold a product housing while production employee screw a PCB inside the plastic.

The issue I'm having is that the product has a few part, some of them have gaps other part are really thin. 

I've tried many things, but none of them seems to work as I need it.

Here's the product I want to make a jig so it's easier for production employee to screw the electric PCB insinde

Side section view of the product so you can see that there's some gap between parts

I tried to create a block a little larger than the product and than use "Combine/Cut" but the result is not what I want.

  

I tried to make a sketch and extrude it underneath the product, but I think that because of the gaps and hole fusion does not want to compute the extrusion.  I tried to fill the void inside using "boundary infill" but it does not work the way I want.  

[laughingcreek]

using offset on these faces so the bodies overlap may allow you to combine the bodies into a single body and close the gaps.  hard to say.  if you attach your .f3d we can probably give you other ideas

[testjig]

I've tried to offset some faces, but Fusion would not compute it.  

I'm attaching the file I'm currently working on, I've tried so many things, currently trying to do only a few section at a time, then combine them, but I'm getting some gap and the front sphere does not compute when I extrude to object.

[testjig]

I'm currently retrying to do surface offset, I haven't work with surface yet, but it seems to do the trick if I select each external face individually, I can't select too much surface as fusion would give me an error, but that's one step in the right direction

[etfrench]

Make it in several sections:

Add bracing to the fixture to make it stable.

[testjig · Accepted solution]

Thank you for your help.  Doing it in section and bracing it would've been a good solution, however, I was looking for a more universal way to do this, because I know I'll have to do it again for other product.

If anyone interested, the solution I found was to make a "surface offset" of 0mm for all external surface, stich all those surface together, patch the gap left by gap between parts and then patch the top to create a body.  Then use that body as a tool with "combine/cut".