hi
in answer to your question i am in the uk ......and the weather is hot at the moment, but could change quickly to heavy rain and cold nights its often cloudy or overcast at the least, but when the sun shines it gets hot.
ok the signs so far are pretty good, neither the weed graft or the vine graft are showing any signs of trauma, infact the weed is stretching upward for the sun, and the leaves at the end of the vine are sill very healthy and are not wilting attall, i was expecting the vines leaves to crinkle and dry up, that would be a sign that i went in to deep with the knife and have stoped its flow of nutriants getting to its extemities, the weather has been very warm here for the last few days and i have wet the tissue a little today just to be on the carefull side, there is still a very long way to go, things could still go wrong.

hi nowhereman,
its easy to graft weed to weed, i have done that many times, mainly for fun, its very easy to graft to a mother plant several strains of cannabis, i cant say that i achieved a new strain however i did get different bud from the same motherplant.
gardeners throughout the world have been grafting different plants for years, roses, fruit trees, various shrubs and plenty of regular household plants, to name but just a few, hey, take a trip to your local garden supplies and take a look at all those standard upright plants in expensive pots, look for a obvious swelling around the bottom or top of the stem, this would have been the graft, this is done becourse it turns an otherwise everyday plant into something that looks real nice, and puts its price up, plant grafting is everywhere its nothing new. it just needs a lot more experiments like this, i wish i had done this earlier in the year i would have a much better chance, but hey its worth another go.........
.............. peace happy ............................