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Nice setup! Where did you find the sink unit?
Are you still running the Truc batt isolator and circuit breaker?

I am sure that glider is very light , but remember that the 4l60e transmission in our vans is amazingly bad at towing. I would not tow anywhere near the recommended tow capacity , and I would not tow anything in mountains at allI recently purchased a retired NASA motorglider from a government auction. It will take me a few months to get her flying, but it's also time for some van changes. I'm going to need to haul a lot more equipment and gasoline for my upcoming soaring safaris. I decided to order a massive aluminum roof rack from Prime Designs. The general game plan is to move my solar panels to the front, and then I'll add some storage boxes, bike racks, and Rotopax gas cans. I'm also planning to install an aviation radio and build a rack for my oxygen bottles.
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I originally thought that I was going to get a Thule box, but now I'm having second thoughts. The main reason is that I don't feel comfortable storing expensive equipment inside of a plastic box. Has anyone installed an aluminum truck box on their roof? Also, is it worth the extra bucks for the Weather Guard brand? It seems like it would be more draggy than a Thule box, but by the time the airflow reaches the back of the van, I imagine it's so f!*ked up that it doesn't matter too much.
I am sure that glider is very light , but remember that the 4l60e transmission in our vans is amazingly bad at towing. I would not tow anywhere near the recommended tow capacity , and I would not tow anything in mountains at all





Here's a sketch of the roof rack. I was trying to choose between Alurack and Vantech:
Alurack: The crossbars attach to a T-slot on the side rails. Accordingly, they can be moved forward/aft to miss my roof vent and such (Yay!). However... the crossbars don't have slots, so it would be annoying to mount everything (Boooo!).
Vantech: More sturdy because it mounts with 6 gutter mounts instead of 4. The cross bars have slots (horray!), but their fore/aft positions are fixed (Noooooo!). They insert into milled pockets in the side rails, so moving them would require a bit of machining.
In the end, I decided on a bastard cargo rack: Vantech gutter mounts, Alurack side rails, and 8020 crossbars.
Side Rails: The stock Chevy Alurack uses 120" siderails. You can buy just the side rail module (PN PD-AR-2104) for $346.65. However, I'm going to use their 128" rails for $401.15. The extra inches will allow me to fit the longest truck boxes that I could find.
Cross Bars: 8020 is half the cost of factory cross bars. For example, a Vantech H3 (1.5"x3"x65") crossbar is $120.12 while an equivalent 8020 extrusion is only $53.30. I'm using 5 cross-bars, so I'll save around $300.
Flooring and front Catwalk: It seems that folks are really happy with Farmtek chicken coup flooring. A 4ft x 2ft panel is only around $25. Most people attach this with zip ties, but I might attempt a flush and I'll hold down the edges with overlapping L-track.
Truck Boxes: The sketch shows two 62" Weather Guard boxes. These are a little pricey, but still comparable to Thule boxes of the same volume. I'd certainly feel more secure about leaving my climbing gear in the Weather Guard. They're also sturdy enough to sit on, so why not grab some marine cushions and a removable pedistal table? I'm still concerned about my gas mileage and I may try to find a lower box.
Solar: I'm going to reuse my existing 100W Renogy panels. However, I'm going to mount them subflush to the crossbars. That way, the cross bars are still available to support lumber and surf boards!
Girl: The girlfriend is a possible future addition, but probably outside of my current budget
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I'm afraid I haven't started on the rack yet. I think it will be a pretty quick project, but first I need to get my glider out of the shop, and it's taking longer than I'd like. Let me know what you do for your rack!I'm reconfiguring my rack set up to make room for my maxxair. How has your rack come together? I'm thinking about the weatherguard boxes.