User usage:

This should all be in the same wireframe (same /url):

select a device family using a drop-down menu
select a particular device using a drop-down menu
customise the selected device using input number fields : number of electrodes, [1]electrode size [3], electrode location [3], (which electrode is being edited, multiselect dropdown)
set the size and shape of the insulator (electrode carrier)
see a 2d graphical description of their selected device in 2 planes
enter a URL to a nerve image (as MBF-XML, from sparc.science) to simulate
upload a nerve image of their own (as MBF-XML) to simulate
move / rotate the entered nerve cross-section in 2D so it sits inside the device
zoom in and out in this view to see more or less context
choose what kind of simulation to run: {mesh only, fields only, generate axons only, simulate nerve recording}
set the kind of axon population to use from a drop-down: {rat pelvic nerve, rat cervical vagus, human cervical vagus} (- eventually enter a URL or upload a file for axon population data)
set what kind of nerve recording to simulate, in terms of axon activity levels {quasi-stationary, steadily changing, bursting} (- set an input spike pattern to simulate by uploading a nwb or some other file?)
get more information about their selected axon population (link)
supply an email address to recieve emailed results
Run the model: this will involve API calls to oSPARC plus the server keeping the session alive to know when to email or otherwise serve the data to the user

Visualisation might be under a seperate /url ?

visualise results (electrical fields, axon population, simulated nerve recording)stored in a file on the user's computer
set some basic properties about the data being visualised (drop-downs, multi-select drop-downs): which axon population is "on"? which electrode(s) are we looking at? show waves, spikes, or both?