I put in a call to RBs today and spoke with a tech who was very friendly and helpful in answering my questions about their bolt-in kit. A few things he mentioned:
-the kit includes bolt-in frame boxing plates
-drop is built into the crossmember so drop spindles are neither required nor recommended
-UPS to Hawaii would run me $490 (ouch)
I'm still trying to think up a creative way to get one of these kits to me here in Hawaii. I can fly standby for free so maybe I'll go pick one of these up in person.
Anyway, now I guess I need to decide between the CE or RB's front ends. I've received messages from people who have been happy with both, so I'm not sure yet which one I'll choose.