I am trying to do my shopping for the metal parts of the dual controls but I cannot find sufficient details on the square tubing that forms the structure. I know that it is 38mm (1 1/2") square but I cannot find any indications of what thickness is considered sufficient. Also there is no detail on the material but I am assuming that a regular steel (not stainless) is used so welding is easier.
It took a little looking but I figured out that the stainless steel tubing used for the control shafts is 1.5mm (1/16") thick so not a problem there. It would be better if the plans were a bit clearer on the material specs on both of the metal types and not leave so much up to guessing.
Another problem is how does the outer tube for the control columns stay centered around the square tubing. In some of the images I see what appears to be a 3D printed part that is square in the middle to slide over the steel structure and round on the outer edge for the outer tube to slip over. I could not find the part in the files I received and there is not really any mention of that part of the assembly in the instructions I have been able to find.
One more question for the forum, the print files I have for the control column head say they are adapted for 0.8mm nozzle. So far I have only used the 0.4mm nozzle that came with the printer for safety. I did try to remove the current nozzle with the wrench provided with the printer but it did not seem to want to turn (yes I was doing "Lefty Loosey") and I did not want to destroy the machine before I had even printed my first part. What I do not know is if those 0.8mm adapted parts can be safely printed with the 0.4mm nozzle?
And a final question. Without realizing it I purchased several rolls of PTEG filament without realizing it. There was one post on the forum I saw that seemed to be indicating that it is OK to use that material and implied that it is actually stronger than PLA. I wanted to see if that is correct and find out if there are any specific changes I might need to make to the settings when using it.