Our local CAT dealer did the ELC swap for us a year ago. Didn't mention anything about a 'dummy' coolant filter, but I do know he charged us to replace the coolant filter; Now, where is that paperwork? On my 40' Lexington, the coolant filter is just left of coach centerline, mounted to the rear close to the rear cap. Mike, have you identified the coolant hoses on your coach running 'in harms way' like Fred described on the C12s? Just wondering if I should also add to my to do list??