Variable angle connector for aluminum t slot

I am working in a project that demands t-slots to be connected in non-straight angles. I designed this connector to fulfill this need. I still did not build the whole thing, but decided to publish this anyway so maybe someone improves it.
I printed one 3 mm tall, but the oscad file I am submitting is 4 mm tall. I think it is better this way to avoid the need for spacers, and make it even easier to connect at some angles.