since I'm a good grandpa, I'm going to show you something funny:
you select the upper face (oval) you Pad and at the end you obtain a new perfectly circular section and the same diameter as the base

I don't understand why you are multiplying posts on the same subject
ask the question 15 times you will get the same question 14 times same reply plus one who did not understand

best practice: turn this Line in blue (Line construction) and do the fillets in the sketch
more: use equality

Edit of Edit : delete your other post since it was answered here

if you want you can do a zigzag
don't forget to specify "transition > right corners"

Edit: With the latest version, there is no more self intersection with "Round corner" good news

I understood what you want
I don't start with PartDesign, that causes problems when you have cuts to make, so I use Sketcher and SheetMetal, if necessary PartWb for angled cuts

quand tu fais "Copier" une fenètre s'ouvre et te montre tous ce qui est susceptible d'être copier , tu décoche ce que tu veux pas emmener et fouette cocher , mais t'inquiète pas si t'as deux fois le plan XY , le second ne gènera pas si c'est pour faire un système à glissières à double queu...

I reread the entire post until my eyes bleed, but I don't see a file anywhere

everything goes well up to "BaseWall" why do an extrusion over the already existing folding

ha oui Ok , mais fouchtrah ça marche pas , ça passe en inch, en Ft, en cm arch mais pas en m