@esilfies what have you learnt? What do you wish you’d known before starting. I am about to start a 23" mirror too and hoping it won’t take me too long.

My first mirror was with two-way acrylic and I would recommend glass instead. After I assembled my frame, the wood expanded in the humidity and pushed the acrylic on the sides, giving it a slight funhouse mirror effect.

I also had an idea on not adding many modules and keeping it clean. But then I kept adding useful modules as time passed. And I never use it as a mirror because a regular mirror is slightly better. Mine is 24". Bigger would definitely be ok, but smaller would be too small imo.