I agree with what you have said , i have tried to keep it as basic as possible , just to see if it would work , and it seems it has , if i really looked into how the root riot cubes are made , what they are made of and what they add to the mix , im sure i could tweak it to perfection , you know as well as i do , when a clone is transplanted into whatever medium it will be grown in , they always kick into life in a day or 2 and any health issues whilst rooting can easily be lost , i root alot of clones , this could be a huge saving for me , i pay 7£ for 24 root riot cubes , with sponge i can match that with 1£.......