Post weld, seat tube opening isn't round. Fixable?

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Jezston

Über Member
Location
London
After it developed a crack in the seat post clamp, I got my aluminium frame welded. Now, the seatpost hole isn't totally round and I can't get the seatpost in.

Now this is kind of to be expected after it was welded and the tighter areas can be reamed out, but I'm concerned that while it's now narrower in places - it may be too wide in others. Is this going to be a problem and if so how might it be fixed?
 
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