Hi OSTexo, I've attached a version that I finished up by splicing together some pieces.

I separated out the top surface and untrimmed it and then stretched up the side walls and then retrimmed it to get back to an original sharp corner shape like this:



Then filleted that, doing those areas all at once to make this:



Then kind of harvest these faces here and paste them into your other model and trim the other model to splice them in:



One tricky part with this is that the fillets made by Moi and SCE have slightly different rotations to their cross-sections, so they don't quite meet up directly - I had to erase the longer fillets along the upper sides and replace them with a sweep to make the pieces meet up easily.

- Michael