Fascinating thread - amazed to read that people have problems with aft CofG! Our sort-of-police-role aircraft are restricted to something like an hour's fuel if the 2 heavy pilots are on shift - we'd do anything within reason to get the CofG back a bit. APFS is 1951kg for our heavier aircraft before role equipment is strapped-on.
Agree that air-con is a must, although the ones fitted to our (2) aircraft are often unserviceable at the end of a long supply chain. You may also find that the sand-filter is needed, although our engines have had significant erosion problems. Take a look at the performance penalties for both in Sect 9.2 first, though.
If you're getting Eurocopter's engineer to fit the sunshades in the cockpit, make sure you check the intercom leads BEFORE he leaves the site. Stanley knives can take a big bite out of those things; not very pleasant when you discover it after the man has gone back to Germany.
Our big ongoing difficulty is blade erosion - stay away from sandy landing areas, OK?!
...and finally, that TLC Helilift is one of the few pieces of kit which does everything you would want it to. The customers here have 3!