Switching out an XE validator this weekend for a Mars with the conversion kit on our ACW4. Of course yeaterday the XE v3.6 keeps shutting down while customers are using it. It shows either 1.6 or 6.9 (sometimes one sometimes the other). I cleaned and calibrated the optics and side scans. Not sure where to go from here except have it serviced. Soooooo glad we are replacing this garbage. It's only been in service for two years and looks brand new inside. Along these lines I may be able to borrow one locally to get me by but are there any issues if it is an older version?? Thank you