MOT test has no bearing on what has been changed or fitted as it's not part of any test or method of inspection,what it does say is that "any repair should be durable and of an acceptable standard with regard to welding etc".
the only time there would be a problem with brakes would possibly an IVA test if it was put in for one after the mods as the brake efforts may differ from original.
Cost : Little as possible.
Thanks : To those who by their generosity my build has progressed.
Its a handmade sports car not a flaming kit car !!!
If at first you dont succeed,avoid skydiving...
No parachute require to freefall,only if you want to do it twice.