A few people have mentioned the W&B issue of taking 4 up in a Warrior.
This, for me, is actually quite an interesting point, as although I have regulary flown the Warrior with 3 pax (i.e. my flight instructor on the right and two other flying school students in the back) - this has always been from PIK.
Now, however, I'm planning on joining Panshangar! Not quite the same TODA!
I'm by no means fat - and my mates are generally speaking all equally sporty types (i.e. Not an ounce of fat between us) and I am used to flying the beast with the weight of 4 people. Its just that runway length...
Thank you, people. A lot of well informed and very interesting replies! Please keep them coming if theres more out there!