Recently I was told that when one makes a Bris they should use the same Mohel they used for the older child. Is there a source for this? What is the reason?
Rabbi Yitzchok Sender Kuperman Z"L in a lengthy piece in HaPardes #68 Vol 3 concludes that there is really no problem switching and using a different Mohel if you have any reason. Reasons can include that the new Mohel is better, a relative, a Talmid Chacham, you owe him a favor, etc.