@KegLand-com-au I've now done 9 brew days on the Robobrew 65L and overall am quite happy with the unit.
One thing I have noticed is that the bottom screen and malt pipe screens both catch and scratch the outer cylinder when being inserted/removed. Although they seem to work well, and I haven't had issues with sediment escaping, they would be better with a silicon o-ring or some sort of other buffer to avoid scratching. When time permits I'll probably make one out of a silicon cutting mat.
Also, the top screen for the malt pipe doesn't really have anywhere to sit on the centre tube, and for thin mashes I've found it doesn't want to sit above the grain when recirculating - it starts to dig in. Again, a silicon o-ring will fix this by giving some resistance.
From an improvement perspective, I'd also like to see a sight glass, especially for checking the liquid level when the malt pipe is inserted or during the lift. Perhaps this could be included as a modular replacement/improvement for the pump return tube. Otherwise it would be straightforward to add one 90deg clockwise of that, which would give the added bonus of being able to use the stamped volume markings as a reference from the outside too.