I had blue's and jack herer grafted onto a exodus cheese mother,I have also Grafted,Cheese onto a Apple tree stem in the past just for a test,Pretty easy to do
I would still use Clone x,But when grafting i leave the clone in the clone x for a bout a hour or so,I found that by doing that it gave me far better taking to its new stem,Make Sure that you ring the grafted new section i used a blue, zip tie on the blues, section.Red one,on the jack i had that for a good few grow's then i just repeated,That was when i had about 4 different strains on the go,Now i'm down to two i just take clones just before i flower,and veg them till the ones in flower are done then repeat,during this time 8 week i just keep multi topping ever single top.
So i normally have a max of 4 plants on the go,I like to keep plant numbers low.In a legal situation i would just have mothers of each plant,I just cut a slit in the stem,and put clone x on it then cut the Clone so it slot's in,I found that the best stuff for holing the clone in place till it takes to the stem,was sea fishing elastic the stuff they use to bound crab's to a hook when sea fishing,Once you have done it added the new section then add a sealer bag over it and mist like you would a clone,You can still close the cord on the sealer bag,right up to the stem,Leave it on for 2/3 days after that just mist for no more than a week,After that no more misting make it work for moisture,By doing that it will take faster.
Make sure you use something to support the sealer bag,to the stem you are grafting to rather than the new clone supporting it,its a great way of having a few diff strains on the one plant.I have even flowered them after a while the main bulk is the main mother,the base plant but great to get a odd branch of a other strain .
Hope this helps tyke