I fly a DA50/Slimline pitts. I have about 7 gallons through the engine mounted on a Sig Sundancer. I estimate the weight of the plane at a 17.5 pounds. I found the NX 23x8 loaded up the engine too much. A NX 22x8 had the type of vertical I was looking for.

I just switched to a Mejzlik 23x8. It didn't turn up like the NX 22x8 but it had the vertical of the NX 22x8. What is really nice is that the Mejzlik is not as noisy as the NX 22x8.

The only bad thing about the Mejzlik 23x8 is it weighs 2 oz heavier than the NX 22x8. It was enough to change my balance point. I am now re-arranging batteries in the plane.