Eurocharged V7 and handheld tune sale!

About a year ago I sold the car, but held onto the tuner 'just in case"..
Well it's looking like I'll be taking delivery of a 2014 507 coupe..
So, what I'm wondering is, will my current tuner work for this car? I am assuming yes...
If so, are there any benefits to tuning the 507? Or is it near the end of it's capability short of headers etc?
And if all that pans out, what's the cost of tune only for a repeat customer? :-)


