Replace a Front Frame Rail - How Much Trouble?

I'm a complete amateur, but I was able to replace a torsion bar crossmember, a section of a front rail, firewall, cowl, uca mounts, with zero experience or brains.

Took detailed measurements, making sure everything was square and straight to start.
Welded in a few pieces of square tubing to keep it all honest.
Started cutting away to see where the rust really ended.
Measured again before/during welding it all back together.

When I sectioned in a piece of frame, I drilled holes in both ends, spot welded plates in the rail, slid them together, spot and seam welded it all up.
I would bet it's stronger now than ever.
But, once again, I'm an amateur.