G'day Mate,
Good job, well done, only a few comments, these are NOT criticisms,
use the alloy spinner, the plastic ones are almost always out of balance & can shake the crap out of a light airframe, & make sure your prop is balanced as well, make sure your prop has clearance from the spinner, we don't want the prop breaking due to rubbing on the spinner, the MA props flex a lot, so give it some clearance.