I screwed up, neep help

SO far I was able to get 10 of the 12 screws out. The going back together will be harder because of starting the screws. I may grind a little of the screw tip off which will give me a little more room but will make starting the screw slightly harder. As for the 2 I haven't gotten out yet it because the window sits slightly to the one side and there is just a slight less space to work with. Im done for a while as the wife has some chores for me since the sun is shining. lol. I will keep you updated. Doug.S thanks for the reminder of the butyl as I will be using it since the screw driver is pushing on the rubber seal and could possibly cut a small slice as I turn it! I am using a very thin and very long phillips to do this and the handle is so small and it makes gripping and turning very hard.
Rod