Hi Mark , your are getting there it's time like that when we need another arm ,it's no consalation but I had a bit of a job doing the same , have you done your cranes yet . I am on with the port one ,it's all together just have to glue it to the slew ring ,if you have not done this stage yet ,the screw that holds the top part to the bottom disk that is glued to the dowel fowls the inside of the bottom part of the crane so it will not fit into the slots a fair bit of wood has to be removed , I did not find this out until I tried to glue the crane to the slew ring ,it would be easier to do before the bottom part of the crane is assembled, I found a pan head screw best it lets the crane turn , when I tried a countersunk screw and it was tightend enough it let the crane turn but it wobbled to much ,also when the 3 cylinders are glued to the slew ring I did not get enough clearance so the crane would not turn360° ,thy fowled on the fixed disc , If you have done the cranes all this is irrelivent but might help some one else , . At -7° it's to cold to sit in the shed .