yes, with a cpvc manifold and ball valve. I hit 89% efficiency every time I brew. typically 10 gallon batches, and with all that room, I can hit some pretty high OGs...
I've got one of those too with the cpvc manifold too. I think I still have some pics of it up here. I moved to AG and to 10 gallon batches at the same time. You can still do 5 Gal batches in it too.
Love it
Found the pic of the manifold I made for it it anyone is interested:
I have the smaller cube...I will add that I like the way some guys have put a new hole straight out the front...rather than using the elevated and angled hole in the back. Much simpler to add a hole rather than ust the existing bulkhead IMO.