printed from PLA with 25% infill. Design is incredible, parts easy to print, simple construction but it seems to be rigid as hell. Holes for nuts (bought on ebay) needs to be drilled and nuts heated up. I tried to glue them into the holes. It will be without display (in VR is not needed) and inside will be teensy 2.0. the front display cover is only change i did.
EDIT 1: knurl nuts was heated up in the flame for cca 5s and pressed into the hole. i used cca 10pcs M2, 60pcs M3x4x8 and 50 pcs M4x6x6. I wish i bought M4s with 5mm outer diameter, not 6 and M3s 6mm long.
Edit 2: Some sanding done. All parts fits together perfectly. Some imperfection due to fast print and pretty high layers. I need to use inbus screws because any other cant fit into the holes. Dont know if this is design or my printer. I have tested it with MiGe 15015. The wheel is ok, no cracking noises, wheel feels absolutely rigid, but when it rattles in crash, all nuts on the back (holding the wheel on servo) was pressed out a little. So i will glue them into the hub. For the paddles i used the stronger magnets (1,7kg) and for me it is still too soft but the feel (as it is my first magnetic padless) is awsome. When you will buy suede for cover, be sure that you are buying the thick one for cover, no thin one for clothing (as i did). The washers between handless are for the thick one, and for me the handles feels a lot better with washers. Without them, i need to sand the top of handle as it feels "sharp". Another thing is, that i will probably print shorter paddle levers, because there are to wide and i can shift only with one finger on the top of the paddle. But this is details which everybody feels different.
EDIT3: Biggest troubles were with electronics. I use Teensy 2.0 with custom USB descriptors. Now it is capable of 64 buttons and 9 10-bit axes. There are no encoders but 12position switches wired up like potentiometers. In firmware i can set if this will be analog axis, twelve push buttons or analog axis with 60 positions. I ruined that replica look with knobs and don't using the thumb encoders. When i find switches small enough, i will add them. The double clutch is in the future plan too. It is not finished yet, but i already enjoy racing with it. The handles are only painted and it was very bad idea. It is slipery like hell when your hands are sweating. My concerns about the shifters were not approved. After few laps i can shift with two fingers without any issue. Even with 25% infill are tough enough to take 15Nm for few hours. I mut end the testing because i cand hold it anymore and my hands hurts.
If anyone wants to use it with Teensy board, just PM me for the fimrware.
0.4mm nozzle, 3 perimeters, 120mm/s, 2500 accel. Printer in tatara frame.