Hi - am thinking of fitting one of the flip up dog guards (THE GUARD IS EQUIPPED WITH TWO GAS FILLED STRUTS WITH AUTO LOCKING FUNCTION WHEN THE GUARD IS RAISED OR LOWERED). The extra seats are fitted in the boot at the moment . can anyone tell me if the two can be fitted at same time. If so, will the dog guard be safe in the up position or will I have to remove the dog guard each time. thanks ken