Thomas V. Szymon S. John W. We installed the receiver enclosure fully with the viewport protector, reducer (temporary, used from ILIGO) and bellows. During the transmitter enclosure installation, John noticed that we are extremely close to the bare viewport, approximately 3.75 inches between the enclosure face and the viewport. There isn't enough room between the enclosure and the viewport to fully fit the standard protector, reducer and bellow. For the one arm test sake, a possible makeshift connection might be made. More work on this to continue.