Thought it would be worth updating this thread. After 7 months I finally have a properly fitting drysuit. After initial suggestions by the Fourth Element rep that the suit could be sent interstate for alterations, my LDS really went into bat for me and organise a completely new suit with the measurements taken by both the photo method and the traditional way as well. The suit fits much better, arms are the right length now, the chest isn't baggy like the first one. Worth pointing out that despite the manual measurements, Fourth Element still fitted the wrong neck and wrist seals. Both suits came with large and I needed small. That was corrected by my LDS before I went diving thank goodness.
Today I did my open water cert dives for the suit and it was 29°C ambient and 19°C water temp. Winter is well and truly over but I have the suit now and I'm happy. To top it off, had a visit during the dive by a couple of dolphins.