Here's how I mounted a bike seat to my trolley handle. I got the idea from a video made by Marty Backe ( • How To Mount A Seat On The Inmotion V11 ). This mount is comfortable for tall riders. The height of the seat is perfect for walking the wheel without need for using a trolley handle. I have over 6,000 miles on my wheel and have never had issues with this seat interfering on trails.
I also show how I mounted lights in a way that is easy to remove for trail riding, as well as mounting a motion sensing tail light (https://www.aliexpress.us/item/325680....