"I purchased this for a Christmas present for my son, so there is no building time yet. However, after making many calls to several Lego stores trying to figure out what kind of connectors the electronics use, I was told they were the same as the Technic sets. This is not the case, and is not made obvious in any pics or advertisements. Even employees did not know. Hopefully it is awesome, because I was getting it anyway. Just seems like an intentionally omitted detail (to be polite). Ugh, Just wish I knew earlier, not a deal breaker, I am sure he will love it. Time to start a new electronics bin. Happy Holidays"