RE: UP-START OR HI-START
Your Vista 2 Meter sailplane can be launched by the smaller Up-Start launching system, but you may not be happy with the resulting altitude. It might be wiser to invest in the Hi-Start system instead. The more expensive system will give you better altitude on your launches.
If you need to make the Up-Start system work, however, you can. It should be able to launch your Vista 2M just fine.