It was openly stated in the roadshows that signing Sentry alone...

It was openly stated in the roadshows that signing Sentry alone could achieve this projected figure.
A binding agreement with Sentry and the revenue that will produce I believe is pivotal to achieving this projection in the stated timeframe, as whilst June 2019 seems light years away to some, it is only 27 months, and as such starting a new 6 month trial period with a new group should Sentry not fully come on board makes that timeframe seem very tight. Perhaps it is possible without Sentry, but it would need a different major group signing sooner rather than later.
I am confident we will see Sentry locked in, then any additional signings will allow for even greater confidence that these projections will be met.