Thanks for the suggestions
I've contacted a member to get the parts machined (probably from Delrin).
I'm also looking at an alternative to make is possible to produce the parts by laser cutting+drilling all the necessary holes afterwards with a bench drill. This method
might enable me to produce suspension arms at the uni's workshop - if the laser cutter has enough power to cut through 8mm of polycarbonate - and if the employees there allow me to. They seem to be really strict about what materials should be machined/cut etc: They pretty much only let you cut Plexiglas and cardboard with the laser cutter - I guess it's time to push them to become more ambitious!
Setup-wise, I've just ordered Losi Silver (3.4) and Losi Green (3.7) 2.5" springs (I used the 2.95 AE Red springs in the video) for the long/front dampers. As for the rear/short dampers, I think AE Silver (3.85) or AE Green (3.5) could work (I used 4.2 AE Blue springs in the video). Like I mentioned before, the oil will go up from #300 to #400 or #500.
Note: All mentioned rates are lb/in.
Someone also suggested a stabilizer for the rear - I think this might help to reduce the loss of wheel pressure on the inside front on power (thus meaning more forward traction)?
Also, it could prove interesting as a means to force a little oversteer on the rear.
Which brings me to your point Naushad... The slick tires didn't seem to affect it's handling much on the first drive, even in the dusty conditions... but it's future 6.5T/5200kV motor (instead of 12T/3100kV) and some big changes in the damping and spring setup coming up, it may be a whole different story on rear slicks!
I also think that when I start testing the car on astroturf, the rear bite will be more important to keep it stable.