Type 9 isn't too bad for heat, and if you are not running lots of power hungry stuff, you could also add the efficient powerplant mod.
I'm running with rank 5 clean drives and an overpowered PP, but that's because i have lots of power hungry modules. I think a trader should be fine.
You do get hot when charging a modded FSD, but that's only a problem if you are trying to jump near to a star, otherwise should be ok if you move away a bit.
Give it a go, and any problems switch out for a clean drive instead.
Just remember, its a % multiplier. Even with grade 5 DD, don't expect amazing results unless you get a good roll combined with a good secondary effect. Low base speed and agility means even with multiplier, your basically adding little.
Having said that, with my grade 5 clean drives, i do feel the difference. My T9 now feels like a T7!
