Bifold door track

[diydazzler]

I'm thinking of replacing a standard 78x30 door with a bifold like this one.
http://www.wickes.co.uk/Wickes-Skip...Clear-Pine-Glazed-4-Panel-1981x762mm/p/187575
My only concern is the door frame.It's a 1930's house so the frame isn't particularly square and there's a bit of a dip in the middle....not massive but noticeable with a straight edge across it.
The bifolds come with a top track,I'm wondering if there will be enough play in the track to stop the door binding when it opens.
What do you think ?

 

[foxhole]

Door can be trimmed to fit if it's not too far off square or parallel.

 

[diydazzler]

I'm not concerned about the doors really,it's the sliding mechanism of the track that I'm thinking about.If the doors aren't hinged at 90 degrees to the track because the frame isn't square,is this going to cause it to bind when opening ?
Spose I'll only really know if I try it

 

[tomfe]

The doors are top hung so can be level using wedges, not a problem.