The print node functionality looks great and would really help retail based installs.
As you contribute a lot to the frappe code base could I suggest this?
If you were to obtain a Print Node Integrator Account and rebrand it as "Max's Super Print App" Developers such as myself could choose to sign up to M.S.P.A and pay the $5 dollars per month they would normally pay to print node to you instead. You would get a $2 per month commission. If you were to get 100 users.. well you do the math. Developers could of course pay $5 per month directly to Print Node.
I didn't find the right solution from the Internet.