I've seen someone posting a Video on r/sffpc where a noctua l9x65 cooler in a s1 is making weird noises caused by Low Clearance between cooler and Side Panel (1mm). Have you consider this too?
Is there a reason why you want go Form acrylic Side Panels? Alu with venting holes Like on Back and Front would Look way more Uniform and more Stable. I'm Not a Fan of Bling Bling rgb