In regards to the TotalScan, check out the link below. This over-the-side mount is the only current recommendation by Hobie Cat for mounting the TotalScan transducer to one of our kayaks(follow the link below):
https://www.youtube.com/watch?v=fVb03zR ... R8&index=1Mounting the battery (even two) to the mast receiver inside the bow hatch of the PA 14 will not interfere with the hatch liner.
As for the Livewell XL, they are currently on back order with no ETA for the new ones with an updated switch. If you currently have a Livewell XL with a bad switch, contact your dealer and they will be able to take care of you when the new switches become available.