Led 67, this TT was recently purchased so I don't know any background on the unit other than it doesn't have a anode rod because someone installed an electric Hot Rod kit in it.
C-Leigh Racing, if I recall correctly they are metal shafts on the valves and both feel normal when opening/closing them. When the bypass is open, the water is bypassing the heater and is cold at the taps.
The next trip out I am going to disconnect the hot side and allow water to flow into a bucket to check and see if I have good flow coming out of the heater. Hopefully this will narrow it down between the right angle fitting and the shut off valve.