Heyy Nice work!! I personally when growing in soil don't flush much anymore if at all. I use to do a week or 2 flush but the plants would be starving!. anyways since I pretty much stopped flushing I have not notice a difference in taste at all. what i will do instead of a week long flush is on the last two day before cut use just plain pH'd water and i have had great results👍 Now if I see some salt build up at the bottom of the pot i will do maybe a 3 day flush. Also another thing I will do is slightly lower the nutes as it gets closer to finish say like the last week an half until I'm a no nutes for the last 2 days. Now I have had plants finish early where I was only able to water once with plain water and there wasn't hardly any overflow when i did an had been feeding nutes all up until harvest but that one watering and it came out the same as if i were to flush. Now if your were in hydro then yeah i would say flush definitely, but I look at it this way with soil as long as your not using any heavy chemical fertilizers no real need to flush because if its grown in the ground outside there's no way your going to flush out the earth around it to get the stuff out of the soil you know? Any ways I hope this helps and if you have any further ?'s don't hesitate to ask. Happy Growing😊