The CEFX axles are great. However, AE does sell a less expensive inline axle option. I have been running it since I got the car.
If you wan to run the ball end king pin this is also avaialbe from AE. Its is from the B3/T3 and is a direct fit to the R5 front end, springs fit like stock...
Trim 6mm from the end of the plastic ball cup to make it fit.
The advantage of this mod is less camber gain as it places the pivot closer to the axle. Note that the axle carrier is taller than the CEFX one so the 2mm spacer used by Joost is not needed.