Involving, as it does, DIN and Reversed DIN board connectors, compliant press-fit pins, round cable, flat cable, and coaxial-connectors, the Berg Backpanel System has, over the past two years, gained a recognized position in the European and US markets.Development and expansion of the system in depth, and in breadth, is still ongoing. One of the major subjects is press-fit: preloaded press-fit connectors and studies focused on the relationship between printed circuit board properties vs. compliant press-fit pin design.This paper presents results of these developments and discusses design options.