Bow vise with double digit price

I've been searching the web's and was not gonna pay triple digits. Found this this on archery talk for $50. Ill be getting one in a couple months when the heats off.

Not my bow, stole pic from AT

Guy has them in a few colors and the pivot different angles. Search "Spewingjason" to find them

Been doing some digging, not sure I like mounting to the stab hole. I do have some cheaper ways to do it if I go that route. Gonna bash the brain more while waiting on my press