Don't know what sort of set up you have but the thing I'd be careful of is the change in the way the mash tun's weight is distributed on the supporting frame when the tun is tipped. Get this wrong and the whole brewery can tip over. Need legs situated out wider than normal.
Here s the Mashzilla, tank is 130l SS pool filter.
A bit of welding for the frame.
It works great for all these BigBrewday .
Can smash up to 200l wort in one mash!
Hope it can help for the design