Hi, hope all is well !
I’m currently assembling 4.1 kit but missing two of the bearings for one of the arms , and also one of the gears (that mount on the motor spindle) doesn’t have any thread where grub screw needs to go , is there way of ordering missing / replacement parts please ?
I’m based in the UK
All the best
G
The bearings are standard MR148ZZ bearings
You should be able to get the locally fairly cheaply, and quickly.
Eg MR148ZZ Unbranded | Miniature Type Deep Groove Ball Bearing | 8mm X 14mm X 4mm
I too, had two missing 
Can’t help with the gears.
Email Bar at info@maslowcnc.com
Andrew
That’s awesome ! Thanks Andrew 
Should have 2 spare bearings, did you put one between motor and gear. You don’t need one there. I left the grub screws out after I found 2 of them floating around when I dismantled the arms for the upgrade. Haven’t noticed any problems operating there yet.
See above link for what I found after watching the 4.1 arm upgrade kit video. Luckily I only had 1 arm together. Video is at the link below.
Ah ! Cool ok I’ll give it another go thanks Tim