Interesting work, which "suburbans" are these. Old Airfix i'm assuming but not the B set coaches?

You've got a lot of work ahead of you but should prove an interesting model.

They're not the B set ones. Composites I would say.

to me the hardest part to get right is the Toplight section. There is little enough room as it is and with the joins it weakens the area.

I know I should be building the controllers for the layout to double check the wiring, but hey....this is fun!

Khris

You might want to run some strip along the bottom of each side (or just above the bottom) on the inside to add extra strength, would also give a lip to glue the coach floor to and shouldn't be noticeable from outside.

What are you using as glue? I tend to use superglue as it gave a stronger bond and if dusted in sodium bicarbonate set almost immediately allowing you to sand any glue that protuded. You just need to be careful not to put too much on though.

Will do. The top is the main concern. Once the strip is glue there it will help.

I use Tetra, which is basically an MEK that also us suitable for ABS plastics as well.

Would never have thought to use superglue. I am assuming the sodium bicarbonate would also give a bit of gap filling quality as well....am I right?

Khris

Yes it makes it much easier to work/sand or file. Usual warning about gluing you fingers to the model and only using small quantities of the glue.