My rainy afternoon DIY project. Now with rev3 (the rimless model)

[Delphinus]

I agree, you could sell those. I'd buy one.

One idea you could try for a "version 2", make the attachment clip part horizontal so it it could work with Eurobraced tanks.

Nice work on the acrylic, I've never had much luck with bending acrylic. Either I heat it not enough and it snaps, or I heat it too much and it discolours (once I had it even bubble up a bit).