I clamped the firewall, the instrument panel and the glare shield in place to check all the measurement to be sure I drille the front angle pieces to the right width. the measure of my front section is not the same that is indicated on the plan. I finally drilled and countersunk the two pieces PF-137 and PF-150
SURPRISE..... when I unwraped my glare shield ,I discover that the 2 holes for the diagonal braces are already drilled. WOW, Buscaddy really work hard to make their kit easy to build.