I had to print a few small PLA parts in the last days, where I recognised one more time that a single sided cooling isn’t suficient in this cases. I searched the forum and Thingiverse, recognising that nearly everyone is solving this problem with a second fan and duct on the left side.
But there is no reason to mess with splicing the extra wires and buy a extra fan, the original one blows enough air for two outlets. It’s in fact blocked by the original small duct opening.
So I designed a simple drop-in solution with uses no extra hardware Works like a charm, no more molten edges even in realy small details!
Look at Thingiverse for details.
Here is a picture. No it’s not the christmas edition, red is the only color I have for PETG
And here a part comparison. Upper one with single fan, right endgle molten. Lower one with the dual: