The plate measures 195mm x 299mm so is unsuitable for my purposes. The plate is also not very flat. The result is about 3mm of corner-to-corner travel. Edit: I contacted Hobby-Wing and they said the product was just within their manufacturing tolerances and offered to replace it with another one for free. They said the replacement would still be 198mm x 300mm so it still doesn't fit for my purpose. I changed my rating from 2 to 3 stars because the seller was willing to communicate even though no solution was found.