BookArc - Insert E

Insert E adds compatibility for the following devices to the current BookArc (2015 and later):
 MacBook Air with Retina Display (2018-2019 models)
13-inch MacBook Pro (2020)

Insert E is not compatible with BookArc mod, BookArc for MacBook Air (pre-2015) or the previous version of BookArc for MacBook (pre-2015).

Not sure which BookArc you have? Previous versions came with numbered inserts (1-8) while the current BookArc has lettered inserts (A-H).