Doing a cut on 2 faces at different angles in solidworks?

Robin,
This method works as well and avoids the need to delete faces:
I uploaded a Step file so you can preview the results.

Answered with a tutorial: https://grabcad.com/tutorials/doing-a-cut-on-2-faces-at-different-angles-in-solidworks--2

This should do what you are looking for Mr. Crankyface (SolidWorks saves the name of the last person to save the file)

Answered with a tutorial: https://grabcad.com/tutorials/doing-a-cut-on-2-faces-at-different-angles-in-solidworks

Robin,
Delete Face works pretty well, but I think there are better solutions.
Try to Delete and Patch like these screenshots show. I did it in two steps, but you should be able to delete all three offending faces at the same time.

I was thinking that this might be done in a few less steps by using the Move - Face tool, but it did not work at all, So I thought of this alternative:
Select the two angled faces, and use the Surface - Offset command (I set it to 2mm).
Now take your sketch and do a cut - Up to surface
The result is the same, but it saves a few steps by removing the splitting, knitting, and thickening commands.

The cool thing about the above option is the Offset command automatically knits the surfaces together.

Hi! Sorry it took me a while, haven't been able to access my PC to upload the files.
Attached the file, again thanks for helping with this!