Thanks a lot for your tutorials and tip for saving these. I also have another question, what my problem is, why can't I find these solutions on my own, which tutorials did you follow to get that good in SketchUp !! I am busy with this model of the Gun Turret now for three weeks and don't make any progress, only the solutions you sent me, in real you are building my model not I

Thanks a lot Box, do you have any idea how I can save your little videos, for watching them later ??

Here is the original file:

And I tried to intersect faces of the model, but got this message:

Test.skp

I succeeded in the last task shown hear, but now I hit another wall and have the following problem, I like to Subtract the solid (in between blue lines) from the hollow Range Finder cove, so that an opening appears in the Rang Finder cove.
I made both objects a group, only the blue lined object seems to be solid, but it must be possible some how to make this opening in the Range Finder cove.
Can anyone tell me how to proceed ??

Put another screenshot here, the bottom and front part must also be open:
And what I also miss is the thickness of the plate must be shown !!

Thanks, this is exactly how it should be, will try it myself !!

Hi, I tried the "follow Me" tool, on the left side of the cove it worked but the front side of the cove must be straight an at an angle 90 degrees, see red lines.

Thanks for this solution, will try it immediately !!!

Hi all, I have a problem with an object I am creating, this is a Range Finder cove for a Gun turret, 95% of the cove is ready but I don't get the angled part of cove not rounded and smoothed to the rest of the cove, any ideas ????