Read vsi 8 then adr and consult a vass engineer. All the rest is crap what you hear. We are the nanny state. does any of thus requiring certification surprise you?

Choose what you want then consult engineer and go From there. July 1 2011 it ass LLC changed, so just do it once and get the papers that make it legit.

If you get Club permit then go crazy, if you ever want full reg you need to get an engineers. If you get pulled over and not approved mods you our can Loose yours and your clubs rights to permit scheme.

Way I did it and confirmed is full engineered so if I want full ref again all I need USA rwc and pay my full reg. If I sell same for new owner.

Try doing that by not doing it right...