Hello, Robin !
You can try here:
http://www.militarymodelling.com/for...p?th=63881&p=4
The registration is needed though.
See the message from
Chris Weiss member there, in lower part of page 4. This his message is from December 16, 2013, but, I feel sure, it is quite short time period gone from that date.
And, probably, some other participants of that discussion are able to help, even today.