Replaced our 26 year old ThermoSpa Concorde Deluxe with a Balboa BP7 Controller and TP700 Topside. The TP700 is about 1" longer than the original Topside. The width was OK, so a jigsaw and hand saw to round out both ends about 1/2" each so the TP700 fits right in. The peel off adhesive sticks well. Look closely to not fit the TP700 and/or stick-on faceplate correctly facing inside. A lot nicer and more modern than the ThermoSpa 2000D topside, and hopefully more reliable as I went through three of those.