How can I use Trex's feathering shaft with my 3DX?

[Ancient Hel!copter]

I broke my "spindle shaft" or "feathering shaft" of my 3DX couple days ago.I think it can use many parts of Trex so I ordered 4 of them and found out those are shorter than 3DX's spindle for 2 mm.
What are you thinking about ? if I replace the old 2 mm collar between center hub and each grib blade with the new one that has 1 mm thiner.
What function is the collar for ?

Sorry for my English! I'm Thai.

Thanks.

[aussiemick]

you can get the 42 mm shafts here

http://flying-hobby.com/productShow.asp?id=1553

you could try the thinner spacer

or leave the existing spacer in, but you will get a much tighter head, which may tend to wobble in hover.

mick

[Ancient Hel!copter]

Thanks you so much aussiemick. :)
I think I should go with thin spacer( just know its name).

Now I got 2 thin spacers and 1 Trex's spindle shaft.
I'll try them next week.

What's wrong with 3DX-450SE ? :shock:
Many people in Thailand who own this copter for 1-2 months try to sale them cheaper and cheaper. :shock: