Originally Posted by mav2000
Well, but riviting them will make it a mess right. That would kill all the clean lines..
Well I replied to your question, I thought. But it did not post. So I'll try again.
"A mess" I'd consider a technique or workmanship problem. I would want all rivets to be the same color as the side panels (black or silver), all holes to be drilled the right size with no skipping or scratching of the side panels or oops misplaced holes, and all rivets square and level. Of course the "squeezed" side of the rivet would be inside.
Whether it "kills" the clean lines or any other part of a look is entirely subjective. I have no problem with an industrial or "techie" look and I'm much more concerned with function.
You could use silicone caulk as an adhesive to attach stiffening ribs inside the side panels so there would be no change to the outside appearance. But that would kill the ability of the added mass to act as a heatsink to the outside.
The monsta heatsinks on the outside would be another question. An entirely different look. If you like it you like it. If you don't you don't. If I were to do that, BTW, they would not be riveted. I'd drill clearance holes in the side panels and tap blind holes (not through to the outside) in the heatsink(s) for machine screws that would be screwed into the heatsink(s) from the inside.