I have played with these on my target drone, Easy to install but it is a fuse and so it only goes for about 3 minutes... Best smoke is in the 1st minute and a half. But they only come in white/gray... If you want to make you're own you could try this place ... lots off goodies http://www.skylighter.com/mall/chemi...?Sort=S#CH8315
Just don't blow yourself up

This place has all 3 colored smoke canisters... I tried to find a skydive supply shop on the web but did not see anything with smoke.