This verse follows 27.2 exactly, except that the three verbs are changed to the past tense: He made, were, and he overlaid. See the comment there.
Quoted with permission from Osborn, Noel D. and Hatton, Howard A. A Handbook on Exodus. (UBS Helps for Translators). New York: UBS, 1999. For this and other handbooks for translators see here .