for pitru kaaryams like shraddham which brahmin should be called our own gotram or other gotram?

A) For pitru kaaryams any gotram brahmin can be called but the first choice is a brahmin of other gotram, if in case other gotram brahmin is not available  and in a compulsory situation our gotram brahmin can also be called but compulsorily we should apply gopichandanam and chakraadi mudras on our body.
As calling our own gotram brahmin should be avoided but in unavoidable situation applying gopichandana and chakraadi mudras we will be saved from greater sins.
सगोत्रं यद्यपि श्राद्धे चक्रांकित भुजं चरेत् ।
स साक्षात् विष्णु सामीप्यं तत्पिता लभते सदा ।।
नरसिंहाचार्य सुळिभावि
मठाधिकारि,
गुंटूर, उत्तरादिमठम्
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