I concur. If your printer is well setup, the printing process is a joy and only the better middle Z requires any support.
The parts have being very well designed with printing in mind. The only advise I can give is print say one corner block and one roller F and dummy fit your tube to see how actuate your prints are and if you need to adjust any parameters to get the neatest/best fit.
Good luck with your build, and be sure to share your results 🙂