The new Nedz will have a needle tensioner like the Dragonfly... The Nedz is a great machine you can tune it to anywhere you want it its easy to get the result you want with the machine. The only downside is the missing stay up spring.

The Dragonfly is an excellent machine too its really fun to work with the downside for my personal liking is that its too light... For me it feels like you have to compensate the missing weight by adding pressure to line with it.

Most rotaries are good for shading and colouring you can get used to everything anyways but finding a substitute for a liner is difficult. But for an allrounder Id give the Nedz a shot.