In general comments were fair ... I found a supplier on line that sold guaranteed units ... catalogue returns. I ordered the Ryobi 30cc pruner unit, (pole chain saw) with AFH04 articulated hedge trimmer, and expansion pole. The individual items would be over £252 .. yet buying this route the lost acme to £89 incl delivery.
What turned up was even better, they had run out of the standard 30cc power units, and had substituted the electric start version. It arrived brand new ... never been started.
Used it over w/end for first time ..... it starts superbly, touch the button and it start effortlessly ... and with touch start means you are more inclined to stop it when you moving etc.
The expansion pole meant I could hedge trim to 2.5m height, including the 'flat top'
I was impressed with the chain-saw pruner ... it absolutely flew through thick branches (3"+) of some oak tress I wanted to trim back ..very effective.
So at least 'so-far' the Ryobi system gets a solid thumbs-up from me.