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Is this what is should look like?

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Mhh, the fan is usually mounted to the left - in your build it is to the back.

This leads in turn to the problem seen in picture 2: you can't fold the fan, as it bumps against the hot end. So that's a clear "not ok" here.

Attention: The lower lip of the fan duct needs to be opened, so that the air will hit the printed object and _maybe_ the lowest part of the tip of the nozzle. That's why it has 2 folding lines.

Regarding the pin: The Pin on which your fingers rest in the picture is to tighten down the filament (the plastic material). As you don't have any material inserted into the extruder, as one sees in the bowden tube above, the pin will just turn and be kind of loose, as it does not really push against much (except a small piece of delrin).

Don't try to turn it tight now (without filament) as you could maybe break the delrin part by accident.

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So if im understanding right the pin is just useless if there is no material in?


Basically yes. It pushes against that black delrin (plastic) thing in the extruder and that in turn pushes against the filament (print-plastic) which is pressed into the spiked bolt in the extruder.

Without material, no or few resistance, therefore pin is easy to turn ("loose"). :-)

Happy building!

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