Is anyone running a Teraflex Long arm upgrade. If so have you been satisfied. I have a 4.5" Rubicon Express short arm kit with a coil spacer and it does not have much flex. Would it be possible to add the Teraflex upgrade and just use my RE upper arms. Or is this just not possible. The main reason for not wanting to do the RE upgrade is the price. I am a cheap ass I know. Or would it be worth it to just save up for the RE kit. Any help would be appreciated. Thanks