Hey guys, new member here o/ I have a 5 years old GT and have gotten completely fed up with the sag and range of about 10-15 km (6-10 miles) in "Fast" mode.I wrote the guy running Marsen Enegy (https://marsen.com.au/product/36v-17-5ah-carbon-gt-electric-skateboard-battery-upgrade/) but he couldn't ship his packs to Sweden where i live so i've decided to do this myself. I had a look at the upgrade @Tad2009 UK (thanks a lot for all the pictures) and think i'm handy enough to handle the upgrade while gaining some experience in the process Someone said the Molicel P26A was good to i figured i can't go wrong with th INR-18650-P28A. I'm thinking of following that Ebike-clip ( ) to figure out how much nickel to use but i'm uncertain of how many Amps is drawn by the circuitry? If anyone has experience with, or have compared different battery cells and the GT I'd be very thankful for any insight or tips you can give me. Could the P28A in 12S5P with a spacer around the heat sink be a good fit? Cheers!