I personally feel 4g is not a whole lot regarding kratom. thats every 2 days roughly?
"4g of plain leaf kratom every 50-55 hours"
i also feel if ya go messin with 7-oh and the like; kratom will lose it effects fairly quick and 7-oh will take the wheel. not recommended but thats me... leaves a lot of others in a very tight spot with little means of escape if any. idk. safe? idk that, either, friend. questionable ino.
to answer the question. yes. adding 7-oh to kratom will add to effects. at what cost? risk/reward. is it worth it to you?