The arrow usually fits on a rest above the hand (though in older bows, there was no rest sometimes). In this case you should probably choose whichever of the rests looks better (the top one looks as if it would have some adverse effects on the arrows flight, though). Also the fletching maybe wrong, it should look something like this (from the shooters view):

-- /
O

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(Sorry if it looks a bit wobbly, but you should get the idea)

With the odd fletching out (the odd fletching is usually now a different color from the other two (though it probably doesn't matter for this setting)). The arrow head also wants to be vertical I belive.

With the stucco, I think it may just need to be more dense, and not necessarily have a higher bump value, though using a terrain would be even better (or anything grooves).

Hope I haven't ranted on too long.

EMC