So, I want to replace the stock bar on my '03 Birkin with something more protective for track days (a roll cage). I see a couple of options: Buy the cage sold by Texas Motor Works, or find a local shop to fabricate one. The one from TMW has the advantage of being bolt in (and can be swapped out for stock easily) but is a bit pricey, especially with shipping to central NJ. A custom bar needs be designed and I need to find a shop nearby that is competent in both design and safe fabrication (and could also get pricey). Comments, advice, random thoughts?