I have taught a number of people (P&W Officers, RSPCA, public) to catch and relocate vens around Tasmania using a variety of methods.
I have always used wild caught snakes as IMO using a"placid" snake is the same as using a garden hose. In saying this, the 1st contact with a snake is a rubber one to initially get the concept of the technique. By using wild snakes it presents the catcher with worse case scenario and therefore do not freak out when they are called to relocate an aggressive snake.
An elapid gripper was designed and manufactured in Tassie that gained animal ethics approval however I personally no longer use this method. I pin, hook or tail depending on the situation and have therefore developed my own pinner using surgical rubber tubing (this eliminates excessive pressure being applied). I have never rushed into a relocation without gaining as much info from the member of public and then assess the situation again when I arrive.
Thankfully, to this date, I have never been tagged by a ven (after 12 years) and those I have instructed have only ever suffered 1 bite from a whitelipped snake. That wa sonly due to the "handler" rushing in and grabbing the whippy by hand about mid body. Therefore irresponsibility was the major factor.
Oh, and in case your wondering, yes I have caught other than Tassie snakes and from some very hairy situations (e.g. after the Rockhampton floods).
Just thought I would through my thoughts in there.
Daz
PS. When possible, I try and make myself available to new catchers to attend their first few, until they build their own confidence.