Hey ING,
Most of the time while trolling we have either in-line or conventional rotating flashers and a rotating bait as well.
Any flasher worth it's salt should have ball-bearing swivels allowing it to operate independently from your terminal gear. In other words, your flasher of choice should not limit choice of terminal gear.
I understand that the Spin-Ray will have the potential to introduce line-twist but it appears to be equipped with two ball-bearing swivels. It should be perfectly compatable with any rotating bait holder you choose.
However, do your ball-bearing swivels a favor and give 'em a blast of WD-40 before their first use and when you're done for the day. That way you'll keep 'em running smooth, increase their longevity and you won't reel in a tangled mess after a long drag....