[GT40Racer]

Can I make a suggestion GT40Racer, you're wasting a lot of resin with such a densely packed base, you can move them around in the slicer, try joining bases together so there's two or more supports coming from one support base.

Probably a dumb question but could you clarify 'densely packed base' please  do you mean the flat section under the car is too thick or there is too much of it? 

I also think I have a lot thicker base than I have seen in other prints - but given I have had mostly success in printing (two failures due to a bad model I didn't check properly) I am cautious about changing too much :)

I will have a look at some videos on 
Do you have any photos of your cars off the printer still with supports etc.  Lots of learning happening here. :)

thanks