The bikes are steady. The Yakima Boa Wheel Trays w/pawls and Tray Straps [preparing for shipping] will make the bikes more secure and distribute stress in the event of an accident. The 2 boards beneath the forks are tied together with a short L-Bracket–assembly shots later.
After fitting, I will finish the wood [Red Oak]. I think I will stain it charcoal and then gloss coat it. I expect a stunning presentation.
The bikes and structure are positioned to ensure there is no rubbing against the van, yet give maximum space for other items. I think I can pack a LOT; but, not the length the Windstar could carry.
BTW, I removed the Windstar passenger seat to carry my RANS Stratus XP.