I was asking more about the type of graft you plan - wedge, whip and tongue, side graft or budding -T or patch buds?
Because citrus are evergreen you need some way to keep the scion from dehydrating for the few weeks until the graft unites.
Note that most citrus grow as cuttings quite easily though I saw some reports that fruit quality and taste was not as good from some trees growing on own roots. Different root stock can give better growth in different soils or different climates but not so important for potted plants or indoor citrus.