So! Did it. And enjoyed it in full.
Not only did you manage to turn a disability into something sexy (guess we shouldn't always pity the disabled), but you managed to make a hot story about a pretty mundane devellopment - well, not more mundane than you presented a lot of toys.
Using Mei the way you did allowed you to keep the predicament of Alex at a descent level (again - very probable as she's a newbie) while giving the readers something to drool at.
The text is easily readable and contains an adequate amount of details - enough to imagine the scene and not too many making the description boring and difficult to read.
Great story.