Cam chain tensioner removal;
I would have done that differently.
You have to take the center bolt out first. What you have done now is to leave a spring pushing on the tensioner even though there is nothing for it to tension (the other end of it should be applying tension to the chain).
The cam chain tensioner is now at the limit of its travel and now you need to remove the spring, reset the sliding part to fully closed, reinstall that part, then put the spring back in, and THEN put the center bolt in.
This all needs to happen AFTER you have put the cams back in the head.
Loaned the bike to a guy who ran it low on oil. Oops!