Replacing vac formed windows

I am currently working on an Ocar XJ12C and I have now reached the stage where I need to sort out the
windows. The kit comes with a vacform as you would expect but whilst the body is very good the vac
form is IMO a very poor fit and I wondered what other methods for marking out plus what materials
and fixing adhesive folk use??

I am thinking along the lines of cutting the front and rear screens individually.The side windows should
be easy as they are flat.

I did PM a member who posts regularly on here and he was kind enough to give me some advice and I
have had a bit of an experiment but my skill levels are no where near his.

Thanks

Cheers
Eric