I have no problems with people using parracors or anything that helps improve there scopes preformance.
I'm not saying anything against that.
Nor am I saying that what works in that scope may or may not work in others. Thats to be worked out for each scope.
And yes you get the eyepiecs that will work in YOUR scope best.
But what I'm finding hard to get is some write ups on eyepiecs say that this "nagler" say is no good because of its field curvature. Then I read the scope was a 4.5 such and such. But it work really well in my F8 Apo
Tell me thats the eyepiecs fault