I'm also looking at buying a GV soon and I'm also interested in the Eastern Trading machine, so if anyone on here has bought one and used it for a while then I would be very interested to hear their opinion.
The price seems very good and the aluminium tubing and attachments seem good too, doesn't look like they do a 110v version so could only use it if you have access to mains electricity, this is the down side if they definitely dont do a 110v.
Guess the 6m tubing will get you started but probably need to add more later on to work at greater heights.