critique my welds..

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Well guys Im new to tig welding but have been around other types of welding for a while.. here is a few aluminum beads that I have ran.  Using both 4030 and 53??  (the marine grade filler)  I believe the reason for the pinholes at the end is due to the bottom piece of that aluminum having a coating on it.  I have less than small bottle worth of time on a tig so far.    Sorry about crap cell phone pics
Reply:Time to start joining the pieces together..So far..So good!...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:They look good except craters at the ends. Try cold start at the edge instead of ending your bead at the edge.  It makes life easier.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:catch can i made  ( bent on brake then welded up)some piping on my car this was one of the first tubing welds i ever doneand another catch can
Reply:looks good except the craters at the end...very niceAaron Olsonmiller dynasty 200dx
Reply:Wow is all I can say.  You really just started TIG welding and made that tank?Impressive.TA Arcmaster 300CM3XMT 304S22P12 suitcase feederX-Treme 12VSOptima pulserTA161SMaxstar 150STLHypertherm PM45OP setupStihl 020AVP, 039, 066 Magnum
Reply:yessir.  took my time turn the heat up to right above where it was just melting the metal and took my time with it... turned out nice
Reply:The problem with tig, and sometimes mig is it can be easy to run cold. Especially on aluminum, I have found that you need to run it hot and just travel quickly. You want to ensure that your getting enough penetration into the material... Looks like your doing good though, nice car.HTP Invertig 201Lincoln Idealarc SP250Miller 180 AC StickBy farmall:They should have held the seagull closer to the work, squeezing evenly for best deposition.
Reply:Nice job! What's your car project?I assume you have the crater filling at the end of your welds mastered?  Just reduce current some before you end, and maybe back up a touch. Let gas flow for a few sec's after weld and  keep tungsten pointed at the bead.