As in any other operating mode its not difficult if that is the way you normally flew. Its the switching between modes that is of course tricky and involves a learning curve. All the operating modes will have their varied advantages along with disadvantages.

Most flew with their forearm cradling the box and this hand operated the throttle which is a slider on the side and the other hand operated the three axis on the stick. A strap or tray would be difficult to use. You could always tell a SS flyer as they always looked as though they were hugging a baby.

John