That ALWAYS happens to me...the trick (for me anyway) is to get a puddle going, then lean that cup back and really push the puddle forward. with the arc and gas.... 4043 by nature "wets" better than 5356 so it should be easier...keep the tungsten close and aim it where there's no heat going(i find myself moving it from the angle edge of one can right over to the other when starting the puddle or if it looses "shape" and needs re-heated.
Then once the puddle is built and fluid, lean that cup back, keep the heat on the filler (and keep the rod in the whole time..no dipping has done me best) and then just push the puddle while steadily adding filler to cool the material...those are my tips anyway, hope they help..You weld looks good to me though *shrugs*
Might wanna go to 20-25 amps...25 is sketchy for me...30 leans towards burning holes real fast if the arc wanders to one side and too high. Patience helps a TON too :P