First time poster. Greetings all. Retired disabled NYC street vendor here. I am on my fifth mobility scooter(Pride Victory 10 models). These things are not made to last, Time to build my own. Been looking at the QS 138 motors kits or one of its kin, two 300AH lead acid batteries and a fahrende bierkiste extended frame. Might go for lithium titanate for the safer chemistry of the lithiums but outside of that...the arthritis prevents a speedy exit in the case of thermal runaway. Will need help with all aspects of planning and build. Especially the frame that will allow a wheelbase similar to the mobility scooter I now drive. The elevators here prevent anything longer or wider from preventing the doors from closing not to mention the elevators in the subway and the access elevator on the MTA buses. . Cheers!