Three very heavy boxes showed up today. I should have known to start a gym membership on the day I placed the order! Although I was well aware that each box would be around 70 lbs, I didn’t quite realize exactly how massive this thing is.
The spindle is scheduled for arrival on Thursday.
Amazing pack job - somebody at Sienci labs must be an exceptional Tetris player.
Assembly will take me much longer than what I expected due to only being able to work in relatively short sessions but luckily there is no rush.
So far I have found two minor inconsistencies - the Y axis box has the two dust shields in it but they were not on the packing list and one of the fastener bags label does not match the inventory list. Not an issue in either case but maybe it is worth revising the assembly instructions to match what is being shipped.
It might also be an extra touch to stick labels on the outside of the main boxes to match the inventory sheet (X-Axis Box, Y-Axis Box, Main Box)
Anyhow, assembly is under way … exciting times !
@Jens Great to hear your Altmill has arrived, at this point of waiting it is exciting to have feedback from everyone who is getting started.
keep us posted on how it goes. 
The assembly is done but I have not yet powered the mill up.
All-in-all things went well. I had a couple of minor hiccups but nothing that I was not able to overcome. Generally, from what I have seen so far and not having run the mill yet, I am very pleased.
Unfortunately, cable management in the area of the controller is an unmitigated disaster. I can accept that maybe cable management is an expense that many people would not like to pay for but I for one will not be subjected to looking at that mess for very long. A cable tray for under the left side of the mill y axis will be first and then I will have to figure out how to deal with the mess around the controller. I guess having a sense of order can be a curse 
Talking about the controller - there is no effective cable restraint (strain relief) on any of the cables connecting to the inside of the controller which is very disappointing to see on an otherwise excellent and well thought out machine. It is as if there was no thought given to that aspect of the machine.
The motor power connectors literally fall off the board if you look at them funny (putting the cover onto the controller had to be done twice over as a power connector kept falling off). I think this is a failure waiting to happen.
The X motor on the left side of the mill is sticking out with no protection to the wiring - I will likely 3D print a ventilated cover before doing much else - certainly before I start moving large chunks of wood around the mill. The Y motors are (at least in my configuration) out of the way so no protection is needed for those.
Wooohooo … we have motion! Next step will be tuning for squareness and movement.
BTW, it’s amazing how much order can be achieved in wiring if one has an unlimited amount of zip ties 
While not perfect, the cable setup is now quite acceptable.
I need visual input for this. I simply slapped the whole controller mess between a few slabs of scrapwood and try to forget it’s there.
Sometimes I wake up screaming…
I’ve not had any problems with the cables connecting to the control box being disconnected. Is this an assumption on your part, or has it actually happened. Weird, as mine aren’t problematic…
You’ll get over it! Even without therapy…
I had one of the power cables pop off twice while trying to put the cover onto the controller.
I now have about 20 zip ties holding the cable bundle together and it is unlikely to happen again
On a related note - where would I find the 3D file for the cable support clamp that snaps into the T slots if I wanted to print a few more?
The entire machine is modeled in OnShape. You can get there from the build pages. There’s an ‘Open Source’ link at the end of the Handbook Section that takes you there.
It’s a little tedious, but you want to Hide the Wasteboard Assembly then you should be able to see the clips modeled. Select one and it will highlight where that component is in the tree. Hint, under Cable Management. Once you drill down into the tree to just the clip component, you can right click in the tree and Export. I exported as STL and dropped it right into my slicer.
I fixed the cable management issue by printing a few more of the clips, then taking the excess cables and tying them up along the rails. The Y cables I tied up on the next to last cross-member, the others across the second cross member.
Now that the MDF is on the top, they’re nicely out of the way.