The original build is here, http://www.expeditionportal.com/forum/threads/125719-M101CDN-build , I've completed the main topper and will fabricate the lift gate this weekend. Both sides open fully for easy access. While it appears top heavy the topper only weighs about 75 lbs at most. the RTT weighs 120 lbs. I was using a modified ladder rack that placed the RTT only 1" lower. The trailer tows great and doesn't lean much in corners. I attribute the lower CG to the heavier chassis and galvanized body.