Good job OM !
(To neutralize, I used the technique of removing
the plate and screen voltages to the 6146, ran the oscillator, and adjusted the neutralizing capacitor for null at the antenna output.)
if your PA is not neutralized then you should be getting lots of grid current variation as you turn the plate tune capacitor (with a dummy load on and no plate/screen volts). So another way to neutralize is to tune the neutralization capacitor so that the grid current stays constant as you turn the plate cap through its range.