Yes. And the Master IS that instrument
We are side by side my Brother. The scenery is the same but the view is slightly different.
Yes, it is the duty of the 'Master' Mason to teach the Craft by instruction; ... Masonic Education. The 'Master's' Tools are the Compass and the Pencil and the 'learned' Master being a Tool of Education for the Craft too.
So I haven't really missed those dots, ... I just didn't go into that specific detail explaining why the Compass is not a part of the Working Tools of the Operative Craft Mason.
Let me try this with another scene.
Stand at the Holy Alter and look at the 3 G.L. in the MM Lodge:
The HB is on the bottom. It is the 'written instruction' from the GAOTU, our Celestial Master.
On top of the HB is the Square. The Square is the emblem of the WM, who is the Master of the Lodge and Judge of the Craft in our earthly labors. And, to the East sits the WM where the 3 G.L. are always in his full view and no one shall cross the Holy Ground to block his view.
On Top of the Square and the HB, is the Compass. ... To understand this, one only has to look to the East and above the WM's head: '
G' ... Thus, the Compass is the Tool of the 'Master', the GAOTU, and used to prove the Master Mason at the Finial Judgment.
.... I'm not saying a Mason can not use a Compass. On the contrary, one must use a Tool to become proficient with it. The operative EA must use the 'plumb rule, level, and the square' to prove himself proficient to be passed to the Fellowcraft. ... The Fellowcraft must prove himself proficient with all the Working Tools of Freemasonary including the 'cement of Brotherly Love' (Judgment) to be Raised a Master Mason. ... A Master Mason must prove himself proficient at instructing the Craft to become "Master' of the Works.