I can schedule for Used Aircraft, but when I'm buying a few I don't worry too much about C or D checks other than allowing in the price. I do schedule them while I wait for delivery, why not, but they then begin flying without C or D Maintenance which damages my reputation and probably some passengers.
If it's not too difficult programming could we please have:-
Add B, C or D Maintenance Checks AFTER Confirming Purchase. With the resultant late availability for service of course but the maintenance done in my workshop rather than the Vendors.