Your welds look nice and neat.
Its hard to see the heat effected zone on the picture (the oval of discolouration around the weld) It can be used to indicate penetration on some of the welds I would expect to see a little more.
The top left weld has a nice zone showing where as the top right one doesn't have as much and tails off towards the end of the weld.
but I wouldn't worry they look at lot better than others I have seen.
M
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