So i've read the other maze3 thread. Sounds as though the problem isn't really with the top being lexan its that they used a retesion method that blows..
why not instead of using a copper top just mod the existing lexan. For instance, get rid of the brass barbs, go with the nylon ones and drill the wholes out so they're like 3/4"(if space allows for it.) Then just use like power poxy or Loctite Gasket Eliminator 518 to mount the barbs and hold the top on, I bet you could really kick up the flow rate with larger barbs. All the cracks found on the m3 so far have been from radial pressure, if you just get rid of the pressure wouldn't that solve the problem? Don't know just my .02
