Hi, I'll try to limit my answers to that which I know

1) As far as I'm concerned (user wise) there is very little technical difference between the turbines available today. They are all marvelous pieces of machinery. This one may have better acceleration while the other might be easier to use. I think that basically they are all very reliable, safe and user friendly.

2) I don't think that they require servicing "often". I've heard that some require servicing after more than 100 hours (and that's a lot).

Barring crash damage the only thing that wears out is the bearings. When I inquired about my Wren someone told me that I should replace the bearings when they sound like a "bag of rusty nails" (his quote).

Servicing is the place that Wren really shines because it's you that does the servicing.

3) I think the choice is purely personal. It all depends on how much money and time you have. I don't know enough to tell you which turbine is more user friendly.

4) Can't help you there

5) Having had my share of wet starts I would really discourage you from using an enclosed engine configuration for your first jet. You WILL have wet starts. On a Roo this would mean some neat flames and a missed heart beat, on a Rafale this would mean a new fuselage.

6) I'm using Digitals on control surfaces. When the airplane costs more than $4000 and flies at speeds above 200mph I really would like to think that my control linkage is as good as it can be. It's not that you can't use analogs, but is the extra $100-$200 really worth it?

7) If you're asking about the kit than the answer is yes, it is that simple. They have done all the difficult steps for you. All yo have to do is bolt the thing together, just like an ARF.

You do not need prior experience (except using a screwdriver of course). Better than that, building the engine by yourself will help you learn a lot about it.

Having said that I must admit to being very fond of the MW54 having built one myself (not from a kit). I guess I might be somewhat impartial but you can search for the opinions of others on this forum. It really is a good engine.

Hope this helps