Rangers have yet to fully implement a functional player trading model even if Philippe Clement and Nils Koppen made a positive start this summer. The Light Blues director of recruitment detailed what the plan was going to be to rebuild the squad and how they were going to bring short and long term success back to Ibrox. One of the pillars of a successful model is selling players at the right time and Rangers will need to avoid the mistakes of the past of things are to change. READ MORE: Rangers Net Transfer Spend Summer 2024Jonathan David transfer speculation serves as Rangers model reminderTh…