Preview objects in list consecutively

Hi,

This sounds like it should be a simple thing but I may be an idiot but I can't figure out a method to do this with ideally keystrokes.

I essentially have 921 curves I have done various things to and need to review in the preview window to check them over (a glance at each should be sufficient but because they've been offset in 3d on a surface in a kind of crazy way [using the Symvol voxel based plugin in Rhino, as Offset Crv on Srf was just getting it too wrong] I do really just have to look at them one by one to catch any mistakes).

What I ideally want to be able to do is to cycle through the list of curves with 'List Item', and have 'Zoom On Preview' permanently on, or triggered by a single keystroke or hotkey combo, on the 'List Item' component, so I can sequentially cycle through all my curves checking them over.  Ideally I'd also like to be able to use keystrokes to increase the slider connected to list item by increments of 1.

I realise I can do these things by using the mouse with the dropdown for 'Zoom On Preview' and setting the slide by typing in the number or carefully dragging the slider, but 'going through the menus' makes the whole thing take, quite literally about 4x as long, so if there's a way anyone can think of I can speed it up, as I have 921 to get through, that would be awesome!

Many thanks!

Rup