Great, thanks Ms-RS6!

Did you also change the regulator (to a 5 bar one) and flash your ECU? The last comment on the thread you sent V8weight says " It may be kind of hard on the pump however, trying to push all that extra volume through a 4bar regulator."

By the way, found the answer to whether the Bosch 044 pump fits inside the tank. Apparently it does with some modification (not sure what kind/how much modifications though).