Inkcut+Silhouette Portrait: issues and speed

Hi!
I'm using inkcut on Ubuntu 18.04. I had some issues making it work, so I pin down here my settings, just in case someone finds it useful.
First, I had to add my user to lp group on a console:
sudo usermod -a -G lp $user
Then, I added the cutter as a printer, choosing Raw Queue Driver
On Inkcut, this is what I had to put on my settings:
Device > Setup > Driver: Inkcut Generic Driver (there is a Silhouette portrait driver, but it doesn't work for me)
Device > Setup > Device > Output: set scale X and scale Y to 5.64
Device > Setup > Connection: Parallel Port with the port being mumblejumble (/deb/usb/lp0)
With this settings, it gets to work, though the speed is much, much less than I was used to.
I've used Inkcut quite a few times before, setting it up never had been so tricky and speed was much better, what could possibly be the reason?

Yep, sorry about the poor explanation. In earlier versions where I didn't have to do these tweaks, cutting speed was much faster. I think it is about 5 times, what it took little over 2 minutes now takes 11.
Thanks a lot for the program, it has been really useful for me, I already bought you a beer via paypal, I know it's not much but I hope you enjoy it and it shows my gratitude :)

Correct!

Wrong.. :((

Raw Printing -> What is Raw Printing

You have to choose "Text-only Printer" !
Silhoutte Cutters are using "GPGL", its simply text based.

Then you can setup your cutter as a "Portrait" ;)