Thread:QuickNick/@comment-26829117-20170726202536/@comment-26829117-20170731112050

QuickNick wrote: ... you mentioned that if a car is in a subsequent series that the upgrades in the current series are effectively free, I don't (fully) agree with this, I had already allowed a points value for each subsequent series featuring the car, I'm now allowing for (rather than a fixed points value) a multiplier of the cost of the current series' upgrades cost for the car which, if set to 1, would effectively make the upgrades free as you suggested.

If a car is best car in a subsequent series with more upgrades than required in the current series then it has to be upgraded beyond the requirement for the current series and therefore the cost of upgrading it here is 'free' as it will be upgraded anyway (or at least always cheaper than any other option for this series). Upgrading the other cars (assuming they aren't used somewhere else) would always be more expensive as you would then incur additional costs

The way the current strategy shows this is to make the car the best car, despite being more expensive than other options and explains in the comments. The costs are realised in the current series and the delta costs in the subsequent series (making it even more of a preferred car).