Yes, 300 SPs equals 30 VPs if you asign 1VP/1SP. Because of that play balance goes out the window - determining the victory levels would become that much more complex.
I am considering building a "Raid" campaign for the Spring 1813 that the Allies (the AI is not a good attacker. The Allied player would try and keep his force intact until the end of the campaign but if he wins his force will grow. If he loses they would diminish.
I shy away from having Supply Points as VPs. Just too difficult to determine the victory levels for me. It is complex enough as it is. The usual equation is:
1. Determine VPs for both force sizes.
2. Add in a factor for troops that are reinforcements.
3. Determine length of scenario.
4. Determine Victory Levels based on the above.
Here is another thing that will toss your victory levels out the window: Victory Points for Officer Casualties optional rule.
I mean, how can I, as a Scenario Designer, determine how many leaders will be lost per side? Capture doubles the VPs too. That is randomly determined for melees (automatic of course for a runover).
I have a complex enough "Designer-Life" without adding in supply wagons too.
Now where is that West Front Manual so I can look up some M4 Sherman entry dates ...
Anyone have a West Front Manual they want to sell?

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Generalfeldmarschall Wilhelm Prinz Peters von Dennewitz
3. Husaren-Regiment, Reserve-Kavallerie, Preußischen Armee-Korps
Honarary CO of Garde-Ulanen Regiment, Garde-Grenadier Kavallerie
NWC Founding Member
For Club Games: I prefer the Single Phase mode of play. I prefer to play with the following options
OFF:
MDF, VP4LC, NRO, MTD, CMR, PR, MIM, NDM, OMR (ver 4.07)