I have chosen the option of fitting grilles to one side of the body, various different panels are provided and the kit can also be built as a brake van if desired!
Since taking these photos I have filled in the doorways with styrene planking, in the style of the Lister tram loco that used to run at the Cleethorpes Coast Light Railway. These will hide the workings of the Kato chassis.
Hopefully this will be a fairly quick build as there really isn't much to it (he says...).
Just in case you wondered what I have been up to in the meantime, I have been dabbling with a little bit of O-16.5 in the form of a couple of scratchbuilt wagons, simply to prove to myself that you can build wagons on 00 gauge chassis without the end result looking exactly like a 7mm scale body on a 4mm scale underframe. The one-plank wagon is freelance, with the body built in styrene; whilst the open wagon is a fairly close model of a Vale of Rheidol ex-Plynlimon & Hafon Tramway wagon with the body built in basswood.
Whilst a O-16.5 project is some way in the future, the direction for wagon building is now established and the chassis donor stockpile is growing at minimal cost.