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How hard is it to warp a cast partial frame with a laser weld? I know for a fact the pulsed arc welders can be very technique sensitive when it comes to avoiding warpage. Have no experience w laser welders. Anyhow, probably obvious as to why I'm asking. Sent out a frame to have some support welded on in order to add a tooth. Came back to me rocking on the model. Pretty sure I'll be removing 'add a tooth to pd' from my offerings. Too much liability, not enough profit.