aiyo bro 7 ... no need thx somuch lah....it is just my nonsence idea nia ...
well firstly i think tat bro 7 can is a track use only ...i dun know he use for daily use...sorry for din know tat bro 7 ...tat is y i give up all tis stupid idea...
like bro maxx say if u follow the y i said u can't wind down ur window jor ...
one more idea is instead u make it slide....u make it flip..
just use the door joint and screw it ..then u can flip up down or left right lor
my problems is tat i can't think of the way on how to prevent the water to enter ur car when raining ...haiz....dumb brain i got ..