Hey man - treid the 5-1-17 version for 250miles using the imperial define and it has a time bug. The MPH seem spot on, but it clocks up the miles significantly slower than the odo.
System clock is way out too and won't let me set it either so perhaps it's a related issue. E.g. it knows the miles part of MPH but is getting the Hour part wrong.
Will you recoup money spent on mods in fuel saved? see my spreadsheets here