airsail said..
It’s a catch 22, more run time means more batteries and more weight attached to you. When I did a demo of the Duotone the weight on my waist was annoying but I guess you would get used to it.
I initially thought the Duotone would be great for flat water pump training but the belt bounced a bit while pumping and your legs still fatigued as quick due to the extra weight. I decided on the Foildrive Slim for that purpose.
I started on the FD Plus kit and progressed to the Gen 2 but never really enjoyed the loss of feels that you get having an aluminium box and battery jammed between the most important connection, also the weight on the board was a killer, I ended up using the slim kit which was better but this waist system is another level of performance.
I am just running a modified waist system at the moment so looking forward to some reviews.