Interesting comparison between A5 and 56. A5 very heavy on the miller end, to the extent that even on a very shallow setting for depth the rear weight bias makes it dig in too deep and you have to walk along pulling up on handlebars. I’ve seen some A series with wheels at the rear of the miller, presumably they are more effective. 56 on the other hand very well balanced, goes at the depth you’ve set with no bother. I’ve done a days work behind the 56 many times but half an hour with the A 5 is more than enough!
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