On another note, there is no reason for U1 to need a 41V input rail. It only needs about 13-14V in order to supply a constant 12.2 V. Why didn't we connect the positive rail of U1 to the 10V zener like U3 and drop 10V?
Like opamp U2, U1 also does not have a negative supply. With a good 28V transformer, with no load its supply is +40.5V which is less than its 44V maximum.
U1 can be powered from the 10V zener diode together with U3 if you want and if the zener diode is rated at 1W then it will get only fairly warm.