I had missed that, you're right. Thank you for the more detailed explanation.
I understand that some emphasis has been put on ease of use and simplicity. But you're selling this to Ultimaker 2 and Extended owners. If we weren't comfortable disassembling the print head, we'd have had a lot of trouble replacing the wonderfully consumable teflon spacer that's kept us limping along until now. Replacing the stepper motor isn't going to be a simple task, which makes me question how much extra trouble the additional parts (rods, bearings, housing, etc) are saving. Personally I don't think I need the stronger plastic printhead housing or the new rods (for example), but I'd love to see those parts available as spares for people who do.
What I'm really frustrated by is the price. This kit is $700 in Australia. It feels like there is a lot of profit in that price, which is tough to stomach for an upgrade pack that arguably fixes some flaws that the printer shipped with in the first place - especially when you consider that the market for this kit consists entirely of people who have already paid for the Ultimaker 2 or Extended.
I suppose I was expecting a reasonably-priced kit to address the fundamental printing issues. Of course I can understand the motivations of Ultimaker B.V. Perhaps it's just disappointing that those motivations align so poorly with mine, and, looking at some of these other comments, with those of others within the community.
I realise that this is somewhat of an entitled rant. As an owner of a high end printer I suppose I do feel somewhat entitled to a feeder that can feed, etc. Perhaps it is time for me to go off-piste and buy an Olsson block directly, then use it to print one of the other feeder upgrades. Of course I'll miss out on some of the very-nice-to-have additional upgrades, but then again, $700 can buy many nice things. Like an entire laser engraver.