Getting a legal representative for both parties is like going to the extreme why do we have reputable members who serve as escrow on the forum they are here because they are trustworthy and funds can be trusted into their hands without having any atom of fear..
The two parties have to come to agreement, whether they want someone from the forum to be a third party in the agreement or they want a lawyers. But you should understand that they may be in different locations since it is a remote job. I dont think the platform has a physical office yet. After checking their website the only way you can contact them and go into an agreement with them is in three ways, their email -
keychainx@protonmail.com, social media account and in the forum.
I read somewhere that when they have to recover wallets from broken device, such device have to be shipped to their offices in some selected locations in Europe and other places. This shows that they have physical office which I actually do not know their addresses yet. There is a level of integrity they will build and it wouldn't matter if they have known physical office or not.