I'm told by the motorhome repair man that my Truma C3402 may end up needing to be replaced. At the moment there is what appears to be a PCB problem and they're looking to source a replacement - but this may not be the worst case. They're quoting around £1200 for a complete replacement but I'm thinking at that price I could consider a contemporary unit like the Combi 4E or even 6E instead - and up-rate the heating power at the same time with a 6E. On the face of it these units look similar functionally (same number of hot air outputs, same gas/electric water heating, similar analogue control if I don't want the fancy digital/iNet option) - so is it feasible to consider such an update? Thanks.