Builder Block Key-Binding

I like this way. It doesn't interfere with other controls.

 

But I think the whole point of this thread is to be able to select a specific block by pressing a button. Yes, that will allow you to quickly change between a few blocks but it's still very limited. You wouldn't be able to select the blocks it switches between. Some people might rather spikes instead of stone to quickly fend off an enemy as builder. I think the method needs to be customisable (change block key/order like with emotes), so using the 1-9 keys or scrolling while pressing middle click may be a more viable option.

I still think you should be able to quick switch to wood or stone by clicking F, but not cycle though the blocks.