Welcome mate, where are you based?
I have an E27 with Whites hydraulic hitch and buckets, to be fair the geometry seems OK, but as Gaz says it's always gonna be a compromise. How much did you pay for the E27z and how long were you waiting for it?
As regards angles, I can't really think of any machine I've driven where you didn't have to be in a certain position to chop down the back of the hole. I always just assumed it was part of good operating, make sure you've finished the back off before you dig futher and snooker yourself as it were.
I would never go back to a manual hitch, even on the E19!
My E27 is up to 900 hours now. Mine also had the fuel filter plumbed in backwards, as others had on this thread. I was constantly changing filters at silly low hours as the machine would start to bog. Studied the lines carefully, and yes, plumbed in reverse! I think there's a slight oil leak from the back of the hydraulic tank too. Oh, and it dropped all the oil from the tank due to a s**t hose clip- right next to a stream, a real brown pants moment. Again, a 'known problem' according to the mechanic- but the factory haven't issued a specific fix. So I now have two hose clips on there instead, and he kept my very technical 'two inch stick cut at an angle' that I chainsawed on site to brace the hose against the gusset- guess he doesn't have any faith in it either!
I'm sure there's been loads of other niggles I've forgotten about, but on the plus side despite a lot of the worst kind of work (grapple and rotator, riddle bucket, pecker), the pins and bushes at the dipper end are pretty good. There's a bit of wobble but I shim it regularly, and when I pulled the pins to inspect I could only measure around 0.03mm of wear at the worst.
@Monkeybusiness - how is yours holding up mate? What hours are you on?