I don't mess around with trying to hold it to remove tendon.
Just cut straight down on both sides of tendon then parallel to remove. You'll have a rectangle in the fat part of tendie
Just my preference but if you have slick side up usually there is a semi transparent film (don't know what it's called). I pull that off, it's slight but I can tell when it's there when eating. It's not as gross as the tendon.
I season with our stuff Biddy but whatever tickles you fancy. It's got bacon.
Bacon
Let go to room temp.
If it's thick I will roll it on cutting board with a jar. This will get the bacon crispier but not necessary.
The Pillow Construction
Start bacon wrap at fat side of tendie and roll like candy cane slightly overlapping.
I lay bacon on board and roll tendies like a cubano cigar.
When wrapped sometimes I will pin end of bacon w/ toothpick in at an angle.
You can also lay the pillow down so that the end is on bottom to avoid toothpicks.
If you want you can roll in your favorite pepper. Either or is great.
I like to cook long on charcoal to side of heat. Your setup will vary.
A solid temp in oven is 350 for 30 minutes. Check bacon done-ness and flip if if you want all around crispy. In my oven it will be another 15 to 20 minutes.