hi I'm thinking of buying a 2016 ETEK 4 as the guy is selling it at £220. Iv done a bit of research and people have said it's really good and it's that different from the etek5 and gtek. But I'm wondering if anyone on here could give some feedback. I'm don't know if I should wait for the etha 2 or save up for the ETEK 5 as I like how it's that the bolt that comes back.