There are often questions about which servo, what PSU to pick, which IONI controller, etc, when you are thinking about doing your Direct Drive wheel based on the SimuCUBE. After discussions with Esa at Granite Devices, I have decided to do a spreadsheet that will provide you with the base information required on the popular servos used by most people.
On this list, I have build and tested almost all servos shown.
Please refer to the screenshot and attached PDF, it should provide a good guide to you. The columns in orange are really the only ones that will matter for most people. PSU selection based on max torque and IONI Pro HC controller.
I hope you will find this helpful.
Link to pdf in Dropbox -->> https://www.dropbox.com/s/mycsqsqlqhyra1m/DIY%20DD%20Wheel%20Servo%20information%20Rev4.pdf?dl=0
edit: 13 Feb 2018:PSU Wattage requirements have now been corrected as per Tommi from Granite Devices input - use the Rev4 file, please. I have been conservative with IONI efficiency at only 93%, so you have headroom.