hey guys i was wondering if any of you know what smoke system to use for an O.S. 91 FS? seems like the 3D flyers use them the most and i have no clue where to start finding a smoke system.

i will be using it in a Four Star 60 Crop Duster and i only have 1 available channel. i also do not want to add too much weight but the four star has a low wing loading so a little weight wont hurt. any info would be great. thx gents.