Why no swing cheek petzl..?

[Joe Newton]

Or just ascend SRT with a wrench then switch to ddrt at the anchor?

As you're prepared to bend the rules anyway with the ascenders this shouldn't be an issue.

 

 

Or just ascend with the wrench and don't bother switching to ddrt?

[tree-fancier123]

 

I use this one, suppose by bending the rules you mean going up without bothering to back it up with a klemheist or prussik, of course if it isn't backed up there is no way of baling out when you reach the hornets nest.

 

The double handed ascenders are probably bulkier to carry about in the tree than a rope wrench, tether and haas, so that method seems better - zigzag already on, just a knot to untie.

 

I think it takes a lot of practice to work a tree SRT, I'd have so many redirects it would be a mess.