Go and see Danny Keane at IGR Yacht services. He is just behind the Athos Hotel in Nidri.
He will either help you himself or recommend someone reliable.
Feel free to mention Aqua Blue!!
Simon Trippier of Sivota Yacht Service [simonsys@otenet.gr]did all my work over the winter. Did a great job too. If you do speak to him give him my regards from Zimbali.