For the last 15 years I have used caravans fitted with Thetford cassette toilets having electric flush. I have just ordered a new two berth which comes with a Thetford swivel toilet which has a manual flush. I see in some of the brochures that these swivel toilets are also available with electric flush. Does anyone know if there is a kit available to convert from manual to electric flush and if so is there any difficulty in installing it. My DIY skills are reasonable. Henry.