BTW I taught engineering at one of the east coast universities for some years so ... you CAN sit in on the Tuesday Thursday class and not miss a thing
No - it’s a one shot class - one prof teaches THIS class and there is NO other comparable class. What you say it true for many but not this one. And I have done just what you have advised in other scenarios. In fact, I have a conflict with a final exam and am taking my exam in another class.