I would only do the removable wink kit if you absolutely have to for fitting it in your vehicle.
Removable wings add weight and unnecessary complexity.

The 60 size MoJo and Saito 100-115 are the perfect combo.
The MoAss mod is integrated into the kit now.
This size fly's just enough slower to give you a lot more reaction time for learning.

The 65 is great if you have a 125-140 4-stroke or 120AX laying around. This kit comes with removable wings.

Here is the MoJo 60 in action.
[youtube]http://www.youtube.com/watch?v=PZHqPuAAVXU[/youtube]

[youtube]http://www.youtube.com/watch?v=6pKU1LFvlMM[/youtube]

[youtube]http://www.youtube.com/watch?v=JFQmodJU0f8[/youtube]