All, I would like graft few more pear varieties into my 6 year old Shinseiki Asian Pear tree. Does T-budding method work well for pear tree?

Also, I read in one of the forum that summer is good time for T-budding. In summer, many days are above 100 degrees in Dallas, so not sure whether summer would work in Dallas, if not what other season is good for T-budding.

Thanks