I'm new and would like some advice if anyone's willing.
Should I be choosing new contracts for these three aspects each race, depending on which are good for which race or just stick with the current ones? Is there a big penalty for cancelling contracts or sign on fees which I should try to avoid?
Hey Jose, I'm new to the game myself. Only played for a couple of weeks but I think signing different manufacturers for each race isn't a good idea. I just stick to the one throughout the whole season.
You have to bear in mind that by signing another manufacturer each race also means breaking up a contract with the current manufacturer which in turn lowers your reputation with them making it harder for you to sign them.
I try to build a high reputation with the manufacturers I currently use so I can get their parts at the lowest of prices when I renew their contracts.
Don't know if this helped you in any way or not but as you can see, forums are not very active :-)