Seat angle tests - is 90 too steep?

From graham butler: 

I have attached pictures of the seat with the 3 angles that we talked about.

Conclusion:  sitting on it 110 is definitely a nice low rider position.  With this particular handcycle I end up too far from the cranks.

I definitely want to be more upright for high rider.  90 is too upright, but I think that 95 will be quite comfortable for high rider.  It feels upright enough to be good for interacting with people.