Your supports look good to me. I agree that they're a pain to work around. My support between the A pillars is bolted in place with the door hinge bolts, and it was a good thing as I needed to loosen it and pull the A pillars together a bit when putting the floor in. They were maybe 1/8 inch too wide.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.