Thanx m8, nevermind, i've done it! Yeah terminal 10 is blank, to be soldered to either 5v or 24v depending on application. The boost sensor needs 5v. Had my hesitations about doing it, and didn't realise how bad my eysight is and how shaky my hands are till now but its come up a pro job! Just pre soldered a bit of telephone wire, jammed it in the hole a bit, and reheated it. Its a fffriggin tiny hole and i reckon about half a mil away from the next gizmo on the circuit board. Hooked them up to a battery and entered the settings- sweet! I got the boost guage (-5 - 45psi) and EGT. BTW, the Auber stuff looks like quality gear, i'm impressed with it. Cant wait to hook it all up in the nav!