Before Ma Nishtano

There is a minhog in klal Yisroel, to remove the keoro from the table, before saying Ma Nishtano.
The minhog in our family (Minhog Fuerth), is to remove only the zeroua and the beitso from the keoro before Ma Nishtano.
Did anyone hear about this minhog? What's the reason?

Meir

My father O"h removed the Zeroa & Beitzo prior to Ho Lachmo Anyo, this minhag has two reasons:
1) So that it a mistake shouldn't be made that these items are actual Kodshim
2) To get the youngest to ask - which is also why we take the Keoro off the table prior to Mah Nishtano

Yehuda Nathan