Grafting.....0 for 30 something

All the grafts I put down have failed. The stem grafts failed almost immediately. The stems browned within a few days. The T-buds just didn't take.

Here is an example:

My take on the problem is either the buds were not cut right (maybe they need to be thicker).

OR...I think my bud selection is not correct. Some of the docs talk about a bud appearing next to a leaf. I never saw anything like that in the stems I used.

Grafting Attempts

I set up some grafts today. I am trying to get the Gibson's mineola onto one of my trees. I went by and got some cuttings from the Gibson's mineola one of there navel oranges.

I tried the following:
On my tangerine...
6 T buds and two grafts
On my grapefruit...
1 graft
On my orange
1 graft

Most of the it was using the mineola stock. I used plumbers tape for all the grafts. For some, I used some grafting wax.

I am mainly trying to get ONE graft to take. Supposedly, I will need to check the t-buds in 12 days. The other grafts will be checked in 3 weeks.