Unfortunately, the two AA cells stopped by not long, so that the second use of the effect can wear off soon. In addition, dissolved in my unit, the controller, the tiny screw can tighten again, however. Here a drop of glue would have doubled the value.
All in all I am happy to have bought the part, the fun, it is definitely worth it, even if it at x. should go times broken. And yet it keeps yes. Was just not expensive.
Who calls his own already larger models, could be disappointed.
Who something but try always wanted: Buy!