Which size basket is it Danny?
I remember when the machine was released in Thailand at their National Championships a couple of years ago there were quite a few people that had trouble dosing at first but by the end of the first day there were plenty of great shots being pulled.
It was the 53mm (53 or 54 from memory) and the trick was to dose without collapse and then level and light tamp.
Jason (the tech from from Astoria UK) did a demo for us tamping on that narrow baskets. Level without tamping pulled exactly the same shot as level and tamped... the narrow and deep basket worked well but for tradition, the USA and now Australia have 58mm groups on the Plus4U.