Capri started building my Retreat today. I had the same question you did regarding the issue of the front slider leaking being particular to Capri. They don’t think it is, and have decided the best solution is to simply not offer the slider. I think we’re talking real rain here, not showers. I know real rain, having lived most of my life in Southeast Alaska, and now on the Olympic Peninsula. I can see how the airflow could push the rain hard against the slider.
All that being said, you will really enjoy working with Capri building a camper. They’ve been exceptionally helpful, friendly and flexible.