Member of the Spectrum und Sam Profi Club
Sadly passed away in 2010.
Updated link to the Comet Instructions: http://sam.speccy.cz/comet/cometv1-3man.pdf
Wolfgangs content has been archived by the German ZX-Team (Link broken as of August 2020 Archive - https://web.archive.org/web/20200621103733/http://www.zx81.de/zxcms/English.html)
Some games he coded for the SAM are:
Hare and Hedgehog