@陆 Hi Eric we appreciate your replying to our problem, unfortunately we don't have the router near us because it is Wi-Fi that's being provided to us, would connecting anbextender and being close to the extender make a difference? We checked latency and it's coming up TTL=50.. which from what you said should be decent enough. You didn't mention anything about the Firmware version so we take it that's not an issue? Also while we are in contact with you would to know build plate is only one-sided or can both sides be used? It's probably one-sided but we can't find the answer online so that's why we are asking asking, lastly where can we find maintenance instructions for plate cleaning and whatnot Thanks