The documentation is now thought to be complete and the soon to be upgraded system is avaliable to test, simply by using stampertest.itconsult.co.uk in place of stamper.itconsult.co.uk whereever it is used in the documentation.
The test system uses test GnuPG keys.
For its RFC1918 TSA, it uses a test CA key and a test timestamping key.
Any feedback or questions would be welcome.
Please note that the Git repo contains all the latest test data and also includes a partial migration of the (soon to be) old system.