Using the vanilla pick block mechanic on projected blocks I think would be a big QoL while using the projector. Hope it is feasible.
Already suggested this to Flaxbeard some time ago. Flaxbeard#128. I wanted to bring it up again now the projector was reworked and still worked on.

Thank you for your time and effort, you've done a great work!
~ Zahkriiven

IIRC when i started to rewrite the projector i did actualy try and do that, but things didnt work out so i scrapped it and started from scratch again.

Which resulted in how it is right now.

It still bothers me that i couldnt get it to work, but this idea is still stuck in my head ever since.. i will get back to this, eventualy

At present, the author has tried their best but failed. They cannot select the middle button and can only use it as a game balancing tool

Mack, why are you replying in so many issue reports and repeating a lot of things that have already been said?

My response habit on GitHub has gradually become our local "author and netizen solving problems together". Even if the author mentions it, we netizens are enthusiastic about helping comments in need and doing our best to provide solutions, even if it is a problem raised several years ago.
If you mind my replies to various questions, I can delete them at any time as long as you ask

Mack, why are you replying in so many issue reports and repeating a lot of things that have already been said?