having your model as a square wont work on the back, the way that router mount engages with the z will cause problems for you.
Also my screw locations for the top are just scaled from a picture so im sure the threaded holes arent exact but should be good enough and my back screw holes i placed them tangentially without measuring 1fs
spindle holder v22.step (2.4 MB)
idk why but mine i always have to multiple by 2540
Thank you so much Matt for the step file - I have pulled the dimensions from it. As for my design, I appreciate the information regarding the back portion. I was wondering why other designs I had seen also had less material at the back of the two linear bearings - I imagined it had to do with clearance. I have kept mine in a block, so that I can get initial quotes on having one made, but also to reduce machining if possible should I choose to make my own once my CNC arrives. I have guessed that they are M5 screws. I really appreciate you helping me out, and I hope your second mount machines correctly.
of course, yeah they require that shape on the back in order to clear the z.
Im printing a slightly beefed up version and machining a metal one with it on the onefinity, or thats the planā¦ well see.
I have lost count of how many videos and pictures I have examined to try to see the back of the mount. From what you are saying, the portion of the router mount at the ball screw, projects back into that vertical rectangular opening on the z axis plate. I will come up with a new version that takes this into account. Thank you again.
Hello, is there any experiment / return of experience from the 3D printing of the design posted by @RogerRabbit (thanks Matt for the sharing) ?
Can it hold out by making a full print for rigidity, while waiting for the OF upgrade ?
oh this was never meant to be used while waiting for an upgrade. just as a place to start if you wanted to machine your own.
the print fit on the money and i made a metal one.
Im going to make some aluminum ones to sell.
Hoping to have them available by next month
I may well be one of your clients. At least you give us visibility on your dates ! and that makes you a good point, others should be inspired by it 
Hey Allā¦ We will be releasing the 80mm spindle mount in a few weeks. In fact, we plan on releasing a number of amazing products/accessories on our one year anniversary. Stay tunedā¦ they are revolutionary! Talk soonā¦
Awesome News Markā¦ youāve made everyoneās morning!
Cheersā
Alex
Awesome!! Canāt wait to see what Team Onefinity has come up with!
i guess they were inspired pretty quickly 
That said, i probably wont be making them if they are going to roll out theirs
Not mine, now Iāve got more money to spend!!
What is the 1 year anniversary date? Might be able to change up my order some before it ships in late June, probably July.
I suspect a number of us will be making a change or two to our orders. Glad I paid in advance so itās not going to hurt when I pay for the new toys, I mean accessories.
That 80mm mount is such good news. For those of us who have purchased and are now on the cusp of receiving our shipping label notification, are we able to request that our shipment be delayed until the 80mm mount is shipping? I sure hope we donāt have to cancel and start over! To our friends at Onefinity, can you please let us know how to proceed?
Many thanks!
Hey Jim,
Please send a message to info@onefinitycnc.com and let them know your concerns and weāll help you out. Thanks a lot and talk soonā¦
Thank you, Mark. Email sent.
Awesomeā¦I just received my machine, so I can set it up with new toys. Great work team 1F!