I acquired a carbon fiber double spider, a Merlin electronic focus motor and, recently, a Gaius smart box for my newtonian telescope. I have to say that all the products are excellent: full functionality, easy installation and use, besides high-quality (maybe the material employed for the electronic devices' case could be improved). In my opinion, the quality/price ratio of these products is unbeatable. Moreover, the after-sales service for solving problems / doubts, or installing the devices is outstanding. I totally recommend these products.