anyone able to recommend an installer who to change the DC motor unit in PJ? After 16 years i think the DC motor died. I think the whole unit quiet worn so maybe better to not diy replace the dc motor ...

Thanks already solved. Ordered spare transformer and motor, turned out only transformer needed change - motor enjoyed a bit of greese and good to go. Each repair service i quoted simply quote / suggest to replace the entire thing incl. of housing and controller. That is not repairing only changing to new one which is almost never needed.