Any Resto Body Techs out there?

[sanchtech]

I got a couple questions about doing a hinge pillar patch.
I'm currently doing an inner/outer hinge pocket and hinge pillar patch replacement. I cut out the panels but didn't brace the pillar. I'm kind of worried now. Should I have braced it?

I also measured the hinge mounting holes(captive nut)from the step wall to the nut for side to side measurements and a pillar bodyline to the nut for the up and down measurement. Should I feel safe welding this in without hanging a door to check fit? I never done one of these and would love to hear from someone that has done a few of these before. Thanks ahead of time.