Throw away the stock o-ring and replace with this one.. and then forget..just fly and fly...very less maintainance , very good performance for hard 3D flying style ... see sharp tracking below  (Head speed at 3,000 rpm!!...low rpm like 2xxx no vibrate problem.. still maintain good blade tracking)

These hi perfomance dampers are designed specially for T-REX SE V2 ONLY.

Using for 4mm Spindle Shaft.

Current Reviews: 4

Submited By: Maxim on 10/17/2009 Mine set was OK for V1 head, but it\'s absolutely useless for V2 head, too small. ---------------------------- Feedback from manufacturer: Please assemble the damper first, then slide the feathering shaft through. Can use lubricant oil if necessary

Submited By: joseph on 09/07/2008 they are too small for headblock housing. even after i stretched them on the feathering shaft and installed them, there was so much play, the grips and shaft teeter-tottered freely. hence, the very sloppy feel during flight with unpredictable flight charactoristics. i thought it might be just this one set, but i ordered 4 sets and all were the same.

Submited By: paul on 07/05/2008 they look smaller the hole, but stretch when put on the feathering shaft...simple installation, and i was shocked how torn up the stock o rings were on a fairly new copterx. an inexpensive and effective upgrade.

Submited By: David on 06/02/2008 My friend rob says good things about these

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