I don't have a NX, but have 8 NTs in the shop now. Well made. The stock plugs were not A3's and that was a problem. Taking out the baffle gives a good boost in numbers. I picked up another 1000 with a Tower muffler. They like 15% and up.

I ran the Evo TPS .455 with both shims out on 15%. I'm going to take one out the next time I run a NT. I have a feeling they will like the extra compression.

As to comparisons, I took off a 46FX and put on a TT. Took that off and bolted on a new NT. All ran 15% and APC 11x7's. The stock NT had a lot more power and drew a lot of comments. Another 46FX would put out hover power on a Sig Somethin Extra on 15% and a 12.25x3.75. Using the same fuel and prop the NT gave it a lot of pull out power the FX didn't have.