It may have been a "rules thing". Having served on my local track rules and tech committees, I know it was at our track as well as our "sister tracks" within our area. We used pretty much the same rules to allow for racing at each others tracks. Lubbock ran on Friday, Amarillo on Saturday and Clovis, NM on Sunday. We required inner panels remain intact for the bomber, hobby and street stock classes. The only modification to inner panels that was allowed was the drivers side door to allow for rollcage door bar clearance. We felt inner panel design allowed for rigidity, structural integrity and crush panel function.