hello everyone, yesterday I got a new 811be as well and start building it..the kit is really great as I have seen from the completed version.. however I have an issue with center diff. after I assambled (double checked everything is correct) center diff, when I hold the spur and rotate one side clockwise or counterclockwise , it seems in a point the gears are kind of stuck and it is really hard to continue rotating. I disassambled and found out that the bigger gear inside the diff makes the issue in some point.. do you guys think this is an issue or after breaking in the diff with usage this will disappear? many thanks.