Pro5x2, you have the Progress bar like I do so you won't be able to get the bar "parallel" to the ground. By parallel, Rob means getting the "arms" of the bar (the points where the endlinks connect) horizontal with the ground. This is only possible with the AWR and RacingBeat bars as far as I know. The Progress bar is essentially the same as the stock bar, just thicker. The rear trailing links are in the way, preventing ther Progress from being horizontal. What I did was get the bar as close as possible without hitting the trailing links (about 1 mm away on both sides). To do this the AWR endlinks were extended quite a bit, which is perhaps why one of mine bent. I'm convinced the AWR endlinks are not intended to be used with the Progress bar.
As for the install, if you want to use the AWR endlinks and adjust the bar as mentioned above you're going to need ramps or have some finesse with multiple jacks. For proper installation the rear suspension needs to still be under load. I used ramps, personally and made sure there was no binding or forcing at all with the endlinks (as I was told to avoid noise). I even tightened them down what I thought was tight (I guess not tight enough) but they still made noise.
I'm happy with the Progress bar and stock endlinks for now. If I find I have another bent endlink I'm likely to get the RacingBeat swaybar, MSP rear subframe and try again with the AWR endlinks.