E2 hitch setup question

With the E2 the hitch and head are the same for all configurations, only the bars change. I'd pick up the 1,000lb bars if you have the round bars or the 1,200 if you have the trunnion. I might even contact the manufacturer and see if you can swap the round bar to trunnion if you have the round bar, I found their support to be very responsive when I had a question about the alignment of a weld when I received my unit (someone in China didn't square two pieces before welding, engineers said it was within spec and therefore safe). New bars are about $110/pair from etrailer, much cheaper than a new wdh.