... a Brey Krause Harness Bar. Simpson 6 point with cam locks. Brey Krause Fire Extiguisher Mount for 2.5#, ProWerkes Bottle/Bar Mounts for 20# Fire Suppression System (for Solo I). I am awaiting a camera mount for the Harness Bar. Drop me an email and I will send you some pics.
I installed hardbar's bar and it is awesome and super light with no bottom brace. Gary was top notch in service and he is a full blown racer who also was a engineer so he knows what he is doing.
Just keep in mind harness bars are not legal in true scca solo1. You need a minimal rear rollbar of a certain thickness with a cross bar.
Autopower carries the best in scca legal bars.