Some insurance companies will write you a policy as an M2 rider even when you're only technically an M1 so long as you have proof of successful completion of a MSC. They recognize that the waiting period does catch some people on a technicality and that for all intents and purposes you are an M2. They will typically require you to send them proof of the *actual* M2 having been obtained within 30 days.
In the meantime, get quotes based on M2, not M1, and ask if they'll do this for you. There may be tradeoffs however, if an insurance company that WILL rate you as an M2 before you're technically an M2 is $500/year more expensive than an insurance company that won't offer that...but you only need to wait a few weeks until you technically *are* M2 anyways, well.....ask yourself how much those few weeks of riding are worth to you.
In short, until you have the MSC form in your hand, let the bike sit - the alternative will cost you a lot more.
In the meantime, get quotes based on M2, not M1, and ask if they'll do this for you. There may be tradeoffs however, if an insurance company that WILL rate you as an M2 before you're technically an M2 is $500/year more expensive than an insurance company that won't offer that...but you only need to wait a few weeks until you technically *are* M2 anyways, well.....ask yourself how much those few weeks of riding are worth to you.
In short, until you have the MSC form in your hand, let the bike sit - the alternative will cost you a lot more.