Adding an inner forestay

[RoyB]

We're changing boats and I'm considering adding an inner forestay to the new boat. The boat is a Jeanneau 42I performance
Purpose would be to hang a storm jib. The boat has a fractional sloop rig with significantly swept back double spreaders.

I imagine I'd mount the top of the inner forestay at or below the level of the upper spreaders.

Any problem mounting the inner fore stay without a corresponding back stay or runners?
Anything else I need to consider?