Syncro 4&4 Discussion and Q&A last answered over 2 years ago.
You may also want to visit the Wiki(pedia) for a more structured index of T25 repair, maintenance, technical and ownership topics (browse for Syncro links)
You can find further syncro specific information on the Syncronauts website.
For info - I've taken a deposit on my T25 camper, so with any luck the sale will go through and I won't have to sell the Syncro . So apologies to those who've expressed interest in buying; If the situation changes I'll re advertise here rather than fleabay.