Looks nice. It'll work fine. You are doing the thin metal technique with a bit of weld, a pause, then a bit of weld. You can probably reduce the pause between welds to make things stitch up a bit better. Maybe on the next setting down. Trick is to get the next weld in before the previous one cools down.
Looks absolutely fine as it is for welding a car. You get into more fiddles when you get into an awkward position under the car but that's just practice. If you have to weld overhead then use higher wire speed.
When I went to evening classes to learn to weld, the tutor, on learning I was planning on repairing a car, clamped some thin sheet to the underside of the bench and got me to practice on that.
watch your heat input (wire speed) too much heat and the sheet steel will pull and distort into what looks like crumbled A4 paper. plenty of techs, and and spread the heat.
will reduce this effect.
try practising on a couple of bits butt welding with a small gap , welding flat plates can lead you astray ,, even a lap joint or two , and buy your self a good lump of copper , and play with that too , its a must have skill for car body work repairs.
So I’ve been slowly cutting more of the car away, probably more than required. Looks like inner needs to come out aswell.
Any idea whether the original spots would be through all 3 sheets? So
If I just continue the drill through will it release from the floor?
thanks for all the tips. I’ve been practicing more and trying out the welding upside down etc. Seems pretty straight forward. Following all the guides on forum seems to make it pretty simple.