Did you have a Wonderwand with the machine, if so give it time
these are the marmite wands of the industry, they feel very strange
in comparison to a normal wand, until you get used to it. It may be
the other problems clouding your judgement.
The first time i saw the hose to empty it i felt it was carp, it isn't, it
is just different to what you are used to, when you get the hang of it
you'll find it very useful. And it doesn't leak like wastegates can.
Leave some solution in the tank, it is not a problem, i leave about
5 litres in mine.
You shouldn't be sucking the excess solution out anyway, there should
be a short open ended pipe with the machine to pump out excess.
It's a pity you didn't get the 1085 with heat this would have been a
real eye opener as you get a real pump with that, this allows the tools
to function to the best of their ability.