Clamping is not for newbies. Too much potential for injury. Newbies need to stick with hands only exercises for at least 3 months.
Last I read you were having great success with the newbie routine. Stick with that as long as you are still getting results.
Remember that saying: “If it ain’t broke, don’t fix it.”
If you want to add some more girth exercises in after three months or so, this is my advice:
Clamping should be viewed as the LAST resort. There are lots of manual girth exercises you can use once you are conditioned. At 3 months, I added pumping, as that is a very safe and gentle exercise