I was very impressed by the delivery of this item.Took a little time to try and figure out exactly what part goes where.Finally got it... the hand control wouldn't work... thst might have been my problem though so I don't have any complaints with thst. However, I did have an issue with one of the step motors. I even swapped it with the second one to check the wiring but the second motor was fine.I contacted the seller and he told me to send a video of the problem. The link hame wanted me to send the video on was too small for such a file.. i asked for a different way of doing it. But to no avail... so I have returned it... not happy at paying the cost of mailing it back to Prague... but let's see if they refund the cost.Hope so.*******************UPDATE*****************After waiting a short while this company did as they said and refunded my money and mail costs... its a shame it came to that as I was really looking forward to using that product.