I am considering a wind out F45s for the van. Currently has roof rails fitted which I use. As it's the LWB I have the second from the front mounting point free and the one at the rear jus in front of the very back point. They are nearly 1.7m apart. Would these be able to be utilised to fit the awning using something like the Fiamma 98655-648 multivan kit? It says not as front and rear mount points needed?