| Uhm...dunno about stamping the service book...not much point really if the bike is now well out of warranty by now.
As a buyer, I would be more interested in the receipts from the service and whom it was carried out by.
So do insist on a full breakdown of what has been done (they should do this anyway without being asked) and keep this somewhere safe with the rest of your bike paperwork.
You should be alright with pro-twins though...they have a good rep. | 
Hybrid Mode
