A simple clip on fan air deflector for the stock CR10 hot-end that ensures cooling air is deflected over the upper section of the extruder hot-end and not the head block.
Improves temperature stability, reduces heat waste.
Recommend PETG to reduce any unlikely heat impact.
Tested, works well considering how simple it is.
No distortion due to nearby heated parts.
STL has break-away raft for simplicity.