Custom shim for bottom firewall mounting channel

A visible gap between the bottom firewall mounting channel CF-CHL-023-C-A- and the steel brackets CF-BKT-019 is present, due to fold tolerances in the former and manufacturing tolerances in the latter. This gap is approx 0.4mm on the right and slightly larger on the left. These layers however are clamped together by AN5 bolts, which also hold the engine mount. To avoid unwanted flexure and stresses I have made shims from 0.4mm and 0.63mm 6061-T6 sheet which will slide between the channel and the steel bracket