Kevlar or Carbon are definatly not permitted in a Tornado hull. Only in Rudder stocks, tiller extension and cross bar, plus spinnaker pole and snuffer. You can also use it in blocks / pullies.

This boat would be somebodies home built project and if you intend to race in Tornado regattas or as a Tornado at a regatta, you could not in this. Re-sale would not be very good with this boat also as there is no market for illegal Ts.

My advice would be leave this boat alone unless it is going VERY cheap, such as for rig price only.