PBEM campaign end game points

[Weasel]

Hi; Playing PBEM Campaign and I was wondering if you don't spend all the points the computer gives you at end game, do they carry over or do they disappear? I spotted a post 'repair points to support points' that might have answered this, but not 100% sure. The manual stated nothing on this either.

Also, if you downgrade a unit do you still pay the full cost of the unit, or do you pay the cost and the extra goes back in your bank. Example: You have 300 support points; you have an M4 worth 75 pts and you downgrade to an M3 worth 40, do you get the 35 pts added back to your overall points so you would have 300-40+35= 295?

Thanks.