30mm Fan mount on the exsting platform for Rostock Mini/J-Head

Advantages: Enables you to expand your printable height
Disadvantages: The platform part that connects to rod arms　deforms when heated-bed and extruder are at very high temperature(ex.110℃,230℃),printing with ABS. I wrapped it with aluminum tapes. And I attached a second fan to cool the platform part and also to cool printing object with air flowing into the hole in it.
The second fan is working very good for both purposes, getting me to learn that fan to cool printing object is must for g