I use to rack from the fermenting to a secondary carboy then to a bottling bucket for bottling. I use a siphon to move the wine and have had several experiences of slightly disturbing sediment when transferring from the secondary to the bottling bucket which resulted in bottles with sediment. So it has been worth it to me to do one additional racking from the secondary to a new carboy a couple weeks before bottling being careful to leave as much of the sediment in the secondary as possible. This has made the final racking to the bottling bucket much easier to accomplish without sediment.