Runner,
I know of 3 ventings of skins:
Vloop
Knots
Injection
I prefer a thicker skin than .03 ...like .06 to .09.
At times after spraying both surfaces with the G2BG Freeze spray, I add their Rubber Cement and pat my scalp to a sticky consistancy . And also use tape at times, never on an .03!!!
An .03 unit , very carefully with sometimes injecting 91% alcohol under a knicked raised edge.
A thicker , I just peel off.

johnny