Wow you are lucky, i am still on my 04 300. Did you notice a large difference between each new year. When i look at new bikes, don't see much difference. Some say that they seem lighter, and shorter wheelbase.
they feel all about same. that 06 was first with a öhlins front and that 2 map ignition.
those bikes has seen awful a lot of misuse in finnish enduro
races and has hold together wery well.(about 200h/year racelike use in mud,stones,snow,ice etc , equals to 1200l of fuel/year)
1 race about 15 races a year with those bikes and with gasgas not a single DNF cause by the gasgas bike.
sorry about my awful english , i`m native handicapped