Jack is a great seller. Got some parts from him recently.
I had a Mars Trek. Pretty much the nicest EM p/f you will ever find. Diamondcoat from 1977!
The cabinets weren't as well made as US stuff though. Chip board was very heavy and moisture sensitive. Tends to drop "chips" in transport.
Basically it's a Williams game with a much better playfield and 6 digit scoring.