1) I started to type some more info earlier, but decided to spare you some of the details :o) but here we are:
I use a Corsair Scimitar RGB Elite mouse, which has a side panel of 12 buttons. For me, this is a great mouse [ it must be, it has "Elite" in the name ;o) ], so great that when my old one failed after more than 10 years, I bought another. The new one though needed the iCue software to be updated. The new software doesn't quite work the same way or I can't figure it out. I remap three of the side buttons to Shift, Ctrl and Alt. So Shift + Left Mouse works, using JUST the mouse. However, Shift + Ctrl + Left Mouse doesn't work anymore. It used to with the old software.
This is a pain. And I'm still wondering what to do about that. (Custom Macro maybe: OnMouseDown/OnMouseUp, signing up an account to Corsair's forum, I don't know. Not your problem.) It does mean that when I try to organise the numerous variations of modifiers (Shift/Ctrl/Alt) on the mouse and a normal Left/Right Mouse click, I'm currently limited.
My old set up worked great, but now when I try to use your Mod to set things up that the mouse rebinding will allow due to Factorio's limitation, plus consistent/intuitive for me, but minus being able to use double modifiers on the mouse, I've had to change things a lot more than I thought I'd have to.
Bet ya wished you hadn't asked :o)
I do appreciate the help though.
Yes, I changed Raiguard's default key (to craft one item) CTRL + Q, to Y, which works fine. But when I try to change your Toolbars Mod to Y (to Craft 1) it says "Notice: This control has to be mouse related.". Again, confusing to me that Raiguard can use a key, but vanilla needs the mouse.
Which just made me wonder if I can use Shift or Ctrl or Alt and Mouse Button 4/5 or middle click, instead of Left or Right Mouse buttons, to craft. I didn't think of that...
< laugh > I've just tried it and that does work, so I actually maybe able to work something out there. That gives me some much needed flexibility. As someone once said "When you use mods you need to be creative." :o)
2) Ah. Yeah. As you said in 1) "It's messed up.".