Ahh nice you are the one who ordered the 24.5ah! I already have second battery on my MD but was looking to upgrade. Did you drill 3 new holes? My rivets are lose from the 15AH second battery, will you be running a strap? Pics installed please!
I am reusing the one that came with the companion bike seat. I've been eying other cushions that come on cargo bikes. my daughter is small adult sized and she sits for hours but something thicker could be nice.
I've also though about just mouning a regular bicycle seat back there