What do you think about this tongue reinforcement?

Then just leave a little more gap to get more penetration.Have no knowledge on your machine.Maybe a little bevel on your joints will help if you had none before.Flux core is a good wire,I have never used it.I'm sure it's approved.Do not weld across the beam,always lateral.I don't have a mig or tig at home,I just stick what junk I do now with 5p (e 6010) or lo 7018.Retired now for about 16 1/2 years,so what little I knew is slowly slipping away(78 1/2 yrs young)