Has someone else done this?

Jose Dubon

I started doing this but idk if I should continue if someone else has done it.

Florian Hardwig

Minérale and Totentanz come to mind.

Jasper de Waard

I'm pretty sure I've seen these kinds of stems before, but that still leaves plenty of room for originality, I'd say. So no need to ditch it

Marc Oxborrow

Make it a stencil. 

Nick Shinn

I would say continue, and see where it leads. Perhaps the serifs could come to a point, to match the points in the “crossovers”, for the sake of thematic/aesthetic consistency which, IMO, is important. And see how it plays out across the alphabet, and in different weights. Or as Marc says, try a tangent such as stencil-ization, because in every development you pursue—especially if you don’t look at “similar to” typefaces—you will exercise your own taste and personality as a designer, which will make the finished family (or just one font, if that’s what you eventually settle on) one of a kind.

Adam Jagosz

Why abandon pursuing your idea just because “somebody else has already done this”? Even if you start out with the same single idea, the result will end up someplace different anyway. You may do a better job than others, or worse (subjectively), but as long as you have the time and resources, and it feels good... Just Do It ✔

ivan louette

Yes of course do it and let you discover what your own eyes see.

notdef

I don’t have an exact date for this sketch combining roman and italic letterforms into one, but it predates Totentanz. (I love what Minet made of his typeface.)

notdef

Stefan Ellmer’s Nœud is similar to yours in a different way.