Originally Posted by Ernie P.
Khyron; do you have the part number for these replaceable pin cushions? Thanks; Ernie P.
Hey there Ernie! Fancy seeing you here...
There are two ways to buy the pin cushions, either standalone or already installed in dogbones. Having spent a lot of time and beating the crap out of my hands with a hammer not being able to get my stock pins out I would reccomend most people just get them pre-installed (which I might give up and do, we'll see).
Here is more information about them that I've found with Google:
(all IRS parts for TC3/TC4)
pin cushions are #IRS147
pin cushions pre-installed in 4 composite dogbones are #IRS149
pin cushions pre-installed in 2 "big dawg" dogbones are #IRS425
pin cushions pre-installed in 2 "litedrive" dogbones are #IRS2140*
*IRS site doesn't list these but Tower Hobbies does (?)
If you wanna ask IRS any detailed questions, their number is listed by Tower as being (609)476-2371. I was considering calling them up myself to get the 411 on all these.
I haven't gone and gotten anything else for myself yet because I think I'm going to get myself a nice bench vise and a punch because I need them anyway, and maybe then I can install these without hurting my hands or the nice aluminum bones that came with my TC4!
As for choosing between the above, I honestly don't know if TC3 and TC4 bones are totally identical (though I'm guessing they probably are) so I haven't ordered any yet just because I don't wanna get it wrong.