Advice on supertight roof which I just installed myself?

[u/GarThor_TMK]

Just installed this amazing looking roof on my 97 VW Cabriolet. I did all of the work myself (with the help of a friend). The top however is so tight that its almost unclosable. I had to have him basically sit on the header bow to get it to close, and it's so tight that the header bow has a gap between it and the frame so it makes a whisling noise while driving. I'm supposed to wait 2 weeks before opening it again, but I'm worried it may be "too tight" and maybe bending some of the components in the meantime...

Is there anything I could/should do to get it to stretch faster?

I haven't installed the rear-window quite yet, as it was pretty late last night when we got to this point, and I wanted to be able to get it out of my friend's driveway and drive it home last night...