I Haven't had any injuries from mine yet, but I have to agree that you must be very careful with the battery compartment.
There is another interesting development in the wind for the Skytracker in that there is a counterweight arm accessory in development it appears in this video of the product at NEAF 2013
http://www.youtube.com/watch?v=facRv4GIveU
I have spoken to Coleman Coats the marketing manager of IOptron and he says that it should be released later this year. No other details as yet!
all the best
Paul