Awsome work buddy, gobsmacked at your sculpting skills :eek
As to your EL situation, it is possible to cut tape an re-join it if a small section of protective outer coating is removed to reveal the silver layer underneath.
Here's a few pics I took when I first had a go:
As long as one outer track and the middle are joined, the EL will work fine
Up close, a fine line can be seen at the join...
...but to a camera just two foot away...
No soldering was involved either as I found this on eBay:
It needs something like apoxy as a coating to strengthen it a little once it's dry, but it cirtainly saves wrecking the EL with heat).
Another option is proper cuttable/tabbed EL sheets?
Basically, as long as two of those tabs, or solder points (circled in red) are left in your pattern, the cut shape will light up, saves messing with the above method, and no join lines. Plus, you could make a template for the pattern and be able to use it again any time :thumbsup