Just a question purely out of interest. When the door is finally fitting correctly in the door frame and I mean generally not just for this OP. Will fitting the glass, regulator and door furniture make it sag and knock the alignment out again?
When you set a bare door, you want it to kick up slightly at the back so that it pulls down slightly on the striker but it must line up correctly once latched.
Some people choose to dry build the doors to nake sure.
That said, if everything is solid and there is no sag in the door or a post, the weight of the assembled door won't make a great difference