This was our project. WAY under bid for what it was. The crotch was just under 10 foot across and we followed ANSI A300 as close as we could due to the proximity to the dwelling. We started the holes with a 4' long bit and followed then through with the 10 footer. The Threaded rod needed to be bangned through on 2 of the 10 holes but the other pretty much went right through. We also installed 2 cables above to help support the week union. The owner did not allow us to do any pruning while I was up there but it was suggested and declined.
This is the largest european linden in PA so it is rather important to the property.
I was just back the other week and it is doing great, minus the japanese beetle damage.
https://www.facebook.com/media/set/?set=a.404941432900550.93996.151228634938499&type=3
Big Tree- needs quite a bit of weight off before the work. Sorry home owner did not allow this. This falls on them.
Did you install the cables first?
The two exposed braces seem close. Probably a photo, depth issue.
Good job in selling a bracing/cabling job of this nature. Glad that you were saving this tree.