Cheers Kevin! Yeah, not easy, especially with my deteriorating eyesight!
Side panels are on again, but waiting on a book to arrive before making further progress - found a copy of Maru Mechanic #13: 'IJAAF Mitsubishi Ki-46 Dinah Reconnaissance Aircraft' on E-bay, which looks like the answer to my prayers for period photographs of interior and exterior details. It's coming from the States, so could be a while before I get it.