If this is any help,I have also got a profile mesh rda and I'm using it on a squonk mod, I've done 30ml juice with it up to now and no sign of gunk, cotton is a bit brown but flavour is superb, I'm vaping 70vg/30pg and using the .18 ohm strip and it's set at 47 watts, so with that information you might be able to go with the unity as it's just the rta version, I think I'll get another 30ml through it before I rewick and stick a new strip in