Well I've failed - the tool I got from maplin is simply too big in all regards - so got to take it back and try find another. I'm reluctant to get one off t'internet unless someone knows for sure it will fit since I've been EVERYWHERE looking for one and only met with failure
I assume I have the slightly longer original spacers since it's easy to tear the seals when threading the shaft thru - which is what I did
I wouldn't mind but AERO went overboard with these clips that could seemingly hold a tank in place.