As the outdoor projects wind down, I am looking at beginning to re-assemble the TR3 parts onto the Ratco frame. Does anyone have any experience with the new vertical links with negative camber, or with the three degree castor trunnions? They are available new from a number of suppliers but are quite pricey. Swapping in a used assembly from a TR4IRS or later model would be more economical, but is there enough improvement to be worth it?