Just to clear any doubts...the post I made with a picture saying 'heres a weld I did with screwfix mig wire' was a joke...Just to clear that up
I'm currently using weldability gasless wire and I have to say, i like it more than the Sif stuff I used previously.
Also I cleaned the rollers in my mig and they aren't knurled?! A gasless welder with V groove rollers running gasless wire no problem...
too late the damage has been done, we know you are using a pidgeon to weld with