If you like being awkward , putting a ' chicken hopper ' thing thru the fuse , uniflow . Would mean a small hiole in the fuselage .
![](https://brodak.com/media/catalog/product/cache/1ca9ef3ebdbe85f478710cbd71949bb8/bh-494.jpg)
Just use a say 3/4 x 3/4 x 1/2 deep square feed job tacked on , if its too much or a birch like it is .
Though tanks inboard of the spray bar usually work pretty good , for stunt .