Nothing really wrong with those homemade water tubes.
For those who have a '37-'48 engine w/stock heads, in a '35-'36 passenger car with stock radiator, the Gates 21253 one piece hose (available at NAPA) works nicely and looks stock. In some cases a rubber sleeve, also available at NAPA, is required at the head outlet connection.
For those who are installing a '37-'48 engine in a '34 and earlier passenger car, your engine to radiator spacing is greater than '35-'36, so the Gates 21253 hose will not work. In your case the Drake kit being offered now is a good selection.
I don't really care for the "one fits all" flex hose that's mentioned above because it tends to put too much force on the radiator inlet connection tubes which can cause them to crack at the tank connection. Of course this is all JMO.