The 3400 has never had two shelves on the lazy susan mainly because it is under the sink and there is not room. We moved ours to the LR end of the island. We keep cleaning supplies on it and they do not fall when traveling. We make sure it is full to keep things from tipping over. With it moved we can keep the wastebasket sat the other end and access it from both sides. We have two plastic tubs in the middle with vac tools and sponges, etc. Ther tubs help to keep things from falling off the lazy susan.
Happy trails...........................
Sue and Ed Rowe
Hemet California
2005 3400RL
2006 GMC 3500 Dually, D/A, Crew Cab, Long Bed