Anyone with pics/plans of DIY HOB Refugium?

[Hobster]

I remember seeing some pics either here or Nano reefs of someone that made a acrylic HOB refugium. Pretty close to the CPR Aquafuge. Used pvc couplings instead of bulkheads.
Not a Aquaclear mod.

Anyone have a link to that or done one themselves. I searched all over and can not find it.

Thanks