On RTCUS and RTQUAD sized desk bodies, a vertical tambour support is added with the NOUPPER or UPPER1X3 options and can be field positioned around the rear center of the table. Shown to the left is an INSQUAD-II with INHRPLUS5 option plus the NOUPPER option. Nearly 22" of vertical clearance!
No Upper Tambour Support
No Upper Support, No Tambour Support, Rolltop Desk, Roll top desk, Options