David sent us these photos and a suggested method of fitting the SFX20 Diesel sound into a scratch built tanker wagon.

David used the following:

"Cardboard toilet roll centre cut to size and stapled

Black foam sheet from Hobbycraft cut to size, wrapped around the cardboard and painted using a tester pot

Assorted plastic bits from sprues to add realism

Bogie taken from an old Hornby Tanker

Removable end piece made from balsa, painted black

Decals from ebay" 

Thank you David