Lowering my seat was to get me lower anyway and has increased the head clearance that was ok but now a bit more. The Librands is a close fit under a raised roof. Any higher and the roof couldn’t be raised. The standard height bar is not race compliant but is just ok for someone of my height. If you are much taller then maybe not for you! A race spec rollbar must be high enough to give a minimum required clearance above a driver’s helmet using a line from cowl to rollbar (basically).A minor downside to the Librands is the slight intrusion into the rear shelf area. The ply base can simply be trimmed to fit round the brackets that go down to the chassis. The upper rollbar simply bolts onto these and is easily removed if necessary.