Regarding the ergo- I sit in a reclined position (unfortunately not the best for lumbar support) and have my right arm in a long arm splint while working, resting on the keyboard (with scroll-type mouse on keyboard), when I type I do have to sit up but the reclined position decreases the pain- it takes all of the stress off the scalenes and head is supported on back of chair-a special chair that stays reclined with lumbar support is needed but since it is too $$$ I make the chair I have work. This may help you too.