140mm Fan Joiners

**Updates:**
2023-06-15
I have added a few extras.
First is an alternative modified side clip which may allow a little extra space for wires. I have not done a print and test of this one.
Second is a double grill clip that will hold both sides of the grill with a single clip instead of printing two of the smaller clips. It may also be helpful to hold wires a little more securely against the fan.
Third is a new mounting base.
I had used some custom clips to mount into my old aluminium window frames but they are a little awkward to deal with. Since all my windows have a small ledge I decided to make the array, "stand alone' so it would make it easier to move from one location to another or reverse the fan air flow.
The base can be used on the bottom corners of the array or extras can be added in the bottom centres of the array. They are small enough to allow the fan to sit on my relatively narrow sill. They are about 100mm wide but may not provide enough stability if the fan arr