I do not have the storage slide in mine, we wanted the weight savings. I just got a 5ft long dowel, put a storage hook on the end, and presto chango, I can easily retrieve or push storage boxes into the basement.
The generator compartment can be easily extended downward.
I also changed the round sewer storage system to a square vinyl fence post because the good hoses do not fit.
Last, we also run a 1.3kw PSW Inverter/charger with boost along with 4ea 6v cells in a star config (2 in the battery compartment, 2 in the generator compartment). Works great, and I can run the A/C off a 2k generator along with the 320watts of solar on the roof.