I was just directed to RFM for backing up our Duet. Thank you to @wilriker it's amazing!

However, getting it started was a little slower than it needed to be. If you are on Windows and looking for a way to backup your Duet, here is a quickstart guide / manual that might help speed things up for you. (The guide may help if you aren't on Windows, but you'll need to adapt file paths etc as appropriate).

Download and unzip to C:\Users\YourUserName and name the folder 'DuetBackupRFM'
  
Open Command prompt (Start - cmd - enter) which will open at c:\Users\YourUserName

Chang the cmd prompt folder to the one you just unzipped to: 
Type: cd DuetBackupRFM 		; and hit enter

Now you are ready to use RFM to backup your Duet. Read below. 


RFM Duet Backup Commands: 

**note: must use program name, command name, then can use options and parameters/arguments.  
**ONCE a device has been specified (a device profile is created on first use), you can refer to the device without networking options by using the device name. 


RFM Command Syntax Explanation: 

Valid Example command: 
	rfm backup -device YourPrinterName sys 0:/sys

Explanation: 
	rfm 		backup 		-device 	YourPrinterName 	sys 			0:/sys
	program name	command name	option name	parameter for option	local comp. folder to save to	Duet folder to do command to


Things you likely want to do: 

STEP 1. connect to the Duet (creates a config for the Duet as the -device name) and list The Duet's root directory: 
	rfm ls -domain 192.168.1.12 -port 80 -password YourDuetPassword -device YourPrinterName

STEP 2. Backup the sys folder on your duet (already created in step 1 in RFM) into a folder on your computer called 'sys' (which will be located in the same folder RFM.exe is located). 
Note: RFM will create the folder on your computer if it does not exist. RFM will also use UNC / absolute paths if preferred (so you can redirect outside of the RFM folder - see examples at end). 
 
	rfm backup -device YourPrinterName sys 0:/sys

STEP 3. Backup the macros folder for your duet (already created in RFM) to a local 'macros' folder: 
	rfm backup -device YourPrinterName macros 0:/macros

STEP 4. Backup the filaments folder for your duet ((already created in RFM) to a local 'filaments' folder: 
	rfm backup -device YourPrinterName filaments 0:/filaments

STEP 5. Backup the gcode files on your duet (already created in RFM) to a local 'macros' folder: 
	rfm backup -device YourPrinterName gcodes 0:/gcodes


- - Some other Examples: - - 
List all the files in the folders in the root of your duet: 
	rfm backup -device YourPrinterName

List all the files in the sys folder on your duet: 
	rfm backup -device YourPrinterName 0:/sys

List all the files in a folder on duet with spaces in its name: 
	rfm ls -device YourPrinterName "0:/macros/calibration/bed leveling"

If you are using spaces in your RFM backup path or on duet - enclose in quotation marks: 
	rfm backup -device YourPrinterName "C:users/yourusername/DUET BACKUP RFM"  "0:/macros/calibration/bed leveling"

Thanks! I appreciate the macros! It's super helpful to have a framework to begin with. I'm working through them now, and then I'll create that mesh.g and test it properly... may have some more questions when I get there

@fcwilt 0.71mm

@t3p3tony @o_lampe - thanks - I've got a test rigged up with FEP hard tubing going into a mosquito liquid, and silicone tube over it just like this. I did add two oetiker clamps on them - I was surprised the FEP handled the pressure, but it seems fine, and no leaks with a 7 day continuous test time so far. If I firmly hold both sides I can still slowly slide the silicone over the inner tube, but I don't think it will come loose on its own.

@o_lampe Thanks, that makes some sense. I'll get some valves ordered.

@deckingman pretty impressive, but surely you are getting a whole lot of ringing if you are attempting to print those speeds with that mass?

@cosmowave Right, so that's why I'm debating between 1mm wall thickness vs 2mm wall thickness.

So, just about to experiment with using an aquarium pump / berd air pump (will test both options) for a new install. I'm wondering if anyone has used larger diameter (6-8mm) silicone tube for the run to the print head and then split into two cooling jets?

I'm thinking something like 8mm ID, and 10mm OD (IE 1mm wall) to keep the weight down, but wasn't sure if that would collapse too easily, or if the pressure from the pump would keep it from kinking. Then split to 6mm ID for each tusk. 8mm Area is ~50mm^2 and 2x6mm is ~28mm^2x2 / 56. So there might be a small pressure drop into the 6mm tube, before considering the split and the actual air jet outlet size that will add pressure.

Or... is a 2mm wall thickness actually a much better idea?

@nxt-1 they look very nice.

@o_lampe that is very interesting. Not sure I would trust it... but interesting.

@deckingman kind of like an oetiker / stepless ear clamp?
https://www.ebay.com/itm/184506863154?hash=item2af5774e32:g:hU0AAOSwXCVcXil7

@nuramori Wow, not cheap. Are they good?

@tech-raton I noticed it looks like you are running a silicone hose over some ptfe / similar tube into the quick disconnect fittings. Have you had any leakages or spills from the overlapping union?