Review and thoughts on my hardtail MTB after converting to a middrive eMTB using the Tongsheng TSDZ2 with Open Source Firmware. Bike has about 500 miles on it since conversion with mixed use of offroad (MTB trails), greenways (paved or hard pack gravel), and chip&seal /blacktop backroads. At time of recording I also have over 700 miles on my full suspension Giant Trance X E+ 2 Pro 29r to compare against.