I know there is a plan "out there" because I came across it when searching for answers about the on/off switch which helped to reasemble the switch parts correctly. Although the machine is a few years old it has hardly been used, less than 1/2 an hour in total so I belive it is worth persevering. You say it is not designed to be repaired but I have found a site that sells all the spares, (www.powertoolspares.com) so this cannot be the case. I originally took it to a qualified garden appliance repair centre but they wern't interested because the cost would be nearly the same as buying a new one!
Thanks for your safety concern, Pleasant, but all connections have been checked with a multi-meter and will be again if I ever get the housing closed.
Vicky, October 2010