I've also bought the two kits about to construct the "van force".
is not easy, you have to guess a lot of instruction, but , finally i've succed into construct and tranform it (without glue).
The only thing is to take the arms off when you want to transform it. and put them back at the end.
there is some atatchement points like for a VF-1 or the aquarion ...
i'll make some improvement adding some pieces
Edit: images
7700: http://isamu_dyson_fr.club.fr/VF1.JPG
7700 & 7701 : http://isamu_dyson_fr.club.fr/VF2.JPG
Combo: http://isamu_dyson_fr.club.fr/VF3.JPG
Van force
vehicule mode: http://isamu_dyson_fr.club.fr/VF4.JPG
"gerwalk" mode : http://isamu_dyson_fr.club.fr/VF5.JPG
Robot mode: http://isamu_dyson_fr.club.fr/VF6.JPG
alternative head: http://isamu_dyson_fr.club.fr/VF7.JPG