Hi S35 Remco.
Yes I do still have those notes - they are quite old, there might be better ways of doing it by now, and I don't know if the manner of the window fixings in a Sigma 35 are the same as a 362, but the principles should be the same. I'd happily send the doc to you but I am unable to PM you at the mo, don't have your email address, and don't want to publish my own email address on here. So, perhaps PM me when you can, include your email address and I'll then email the doc direct to you.
Kacecar