Targets are 25 - 35 feet and are different sized steel targets my guess would be about 7 inch - 15 inch round ones and a bigger silhouette ones where you must double tap on.
Doesn't the Eotech window sit a bit high on the PS90? Seems it would be difficult to view, with cheek resting on the stock. I put the Vortex Sparc on our PS90 and, being a bit lower, sights great with "proper" cheek rest... but here I am talking and you are competing
We're all different and do what works in our own situations.
The EoTech does sit a little high, it did take some getting used to. I took a look at that SPARC sight, its pretty awesome. does it come with a lower mount? the one i saw a review on had a pretty high mount, looked like it would be just as high as the eotech or about the same... if it has a lower mount im getting one for sure!