The member who helped me was satisfied the penetration was good. The rig was set correcty for 3mm plate and I ran about 6 inch of test weld on the bench before I did this to practice on some 3mm. The only issue was the weld running a bit which is difficult to avoid. I was relying on him to let me know and he was happy with it albeit the weld did run.
Its not pretty but it passed the hammer test on the first run. Now i'm no expert but it looked reasonable to me, not great, but good enough for both of us. Hybrid has me worried, and me doubting us both !