should serve as an inspiration if someone thinks about how to attach the additional batteries to a sp140 trike. For example, 1 battery in the back and the other two on the side of the seat. so it is possible to leave the suspension always the same. no matter whether batteries are in the saddlebags or not. in my example i use my batteries from the e-foilboards for very long and far distance flights. for normal evening sightseeing flights i leave my bags empty. in the pictures you can see how i made it very simple and extremely easy. a saddle bag made off foam mold and full carbon weighs around 400 grams and can withstand much more than is necessary. the battery is secured by a velcro strap. you can also e.g. make from aluminum sheet or weld angles from steel. depending on what you can do easier in his hobby workshop.
the advantage is not only that you don’t have to change the center of gravity with the trike. it also interferes only minimally with air resistance due to the flat position on the side.