MB4 220a: Proper Placement of a Lechi (363:6-7)

The lechi needs to be within 3 tefachim of the wall. If you enclose the fourth wall with a tzuras hapesach does it need to be within 3 tefachim of the walls?

A vertical lechi constructed from several pieces glued/nailed together.

A lechi made by applying extra plaster to the wall.