Has anyone had any dealings with these boxes? im interested in one for my 2.5 TDI A4 w-reg but wanted some feedback from someone who has one before buying one. id rather buy a box type as im interested in a possible p/x for an avant (only a maybe) & i would like to remove it & re fit it. i posted here as its for an A4 & the chip/tuning page seemed a little lifeless! oh & i did search for chipexpress before posting. Anyone got one???? cheers!!