Omnipowers lack camber plates up front, a must have for track setup as is adjustable damping.

 

I suppose my post needs a bit of clearing up.
Ok
you were speaking about a spring dyno. But i believe you meant the Shock dyno. Which tests the force of the shock on compression and rebound as well as travel.

Second off.
The mitsubishi evo is rather new right now. And since most of us will be owning the car for some time. It would be best if you had rebuild capabilities in the us for lack of downtime when the coilovers would need to get services. And the only companies that i know of that offer in house in the Us servicing is
#1 Zeal
#2 RRE setup
#3 Tein

Also, Another issue w/ running springs on a track car is that most springs offered for stock style replacement are Progressive meaning that on track the springs are not as predictable or as quick. It takes a moment for the suspension to actually squat and settle down. When doing switchbacks or slaloms the car becomes most upset.