Hi, I'm in a similar position to you. Recently bought my T6.1 Kombi and looking at options to store all my kitesurf and winging gear - I've 5 boards and 6 wing/kites, so loads of gear. I don't need the rear seats and considering permanently removing them - at least the double rear seat and have it so I can refit the single rear as and when needed. I've seen some interesting solutions from likes of Ovano, Stitches+Steel etc. which I'm considering but also seen a guy's T6 with simple metal board rack based on 2 vertical struts attached to the middle of the floor and roof (don't know details of how attached but was told is easily removable) the other side of racking is then secured to 2 points on the driver's side panel - looked ideal for my use, next time I see him I'll get more details - if interested I can let you know more?