I no longer own the Mombasa that was waterproofed, but I did sell it to another member on here. He did recently mention that the tent held up in a rain storm and no water got inside! Apparently the waterproofing is still working as it should, almost 3 years after it was applied. Hope that helps!
Thanks Greg. I believe I will be moving forward with the plan to waterproof the RTT then. Ours had endured some pretty good downpours over the last few years. Hopefully I will be able to make it out west with it someday.
Oh yea. I had sent an email to Mombasa in regards to waterproofing the RTT. Their advice was to purchase a new rainfly and tent "skin". Yea, right.