+/- 9.5 degrees.. enough?

The T-Rex is all put together now, just waiting on the Futaba S9257 from 
Skyline which will hopefully be here today.

If I'm reading the pitch gauge right, then I've got pretty much 9.5 
degrees pitch each way. (collective.. I haven't done any measuring of 
cyclic throw on top of that, if that makes any sense). Is this enough? 
It's nicely 0-degrees at center stick, so I don't think messing with 
linkrods will make any useful difference. I suppose the only way to 
increase it evenly both ways would be to move out a bit on all three of 
the servo arms.

Should I be looking for more pitch? I can't see that I'd use it right 
away but the chappie whose videos I had a look at ("Finless Bob from 
helifreak") seems to go for 11 degrees, and he says other people go for
12!

whaddaya think?

cheers