We have built four new TRHs for PCAPS. These are numbered 025, 026, 027, 028. These have been modified to use RS232 or I2C communications. We have removed the ferrite beads to the communication lines and added shunts. The board filler was our 'ear goo' and used epoxy to make it water proof. Nail polish has been used to coat the contacts on the transducer. GOR-TEX has been added to transducer to help with protection.