Hello everyone. I recently discovered that the cylinder of my NC50 is in need of machining so I decided it would be a good time to upgrade to a big bore kit. I have been searching treatland and have narrowed my choices down to 3 (mainly based on price). I am looking at the DR, Polini, and Malossi kits. Is one better than the other? Are they the same pretty much? Is it worth the extra money for something like an Athena for example. Any help is greatly appreciated. Thanks.