When to do large bends?

I have a large cypress and a Juniper that need some major bend on long straight areas. The juniper was just repoted a month ago and the cyprees just prunned a bit. When is the best time of year to do this. I'mguess the juniper needs to wait a year to gather stregth. I was planing on doing the saw technique like this

https://www.youtube.com/watch?v=oKRggKq6Ask

I really don't know what advice to give you. Do you realize that from now through roughtly 4 July is the period of maximal cambial activity? By that I mean the cambial cells are dividing rapidly. I think this would be beneficial for quickly healing across the cuts. Of course, this probably also means there will be a lot of sap/resin ooze which will make it messy - on the other hand it is built in cut paste.

From my perspective you could do it now, but you will probably want to wear some disposable gloves. If the tree's damage response bothers you emotionally, then do what you have planned a little earlier in the season - at the tail end of the dormant period (say Feb/Mar). Then you will have minimal mess and quick healing afterward.

If you are simply going to bend the branches without cross cuts, on the other hand, I would wait until July. All the new cells will have been made and be pliable. They get 'lignified' during the last half of the season. So the bends will set quickly and the wire will not bite in (until next spring/early-summer).