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Apply dummy boss in front of the feedstock confluence point to minimize the weld line defects.

Apply curve or chamfered corner to avoid demoulding or inhomogeneous problems.

Either eliminating the sudden huge thickness change or giving curve at the corner will minimize the problems above mentioned.

If the thick design is necessary, hollow out from the possible side. These hollows will help to avoid the sink mark or void. Also it helps minimize the unit price.