The G4 malt pipe has the same proportions as the G3 malt pipe which you seem to use quite happily. As you do not have a G4 and have probably not used one your pontifications are of little value.
Pulling the PRV to start the flow reduces the pressure in the whole system and often leads to the yeast bubbling up from the bottom of the fermenter during transfer. I find a better way is to put some CO2 pressure into the fermenter (via the gas post) to start the beer flowing. Once the flow...
No it isn't. I get better results with the PID turned off. I use the heat exchange dish and the built in temperature probe and regularly get 84% efficiency and a mash temperature within 0.5C of desired setting. I do not use the BT thermometer and I turn the power down to around 800W when...
Why are you using the pump during the boil? It is unnecessary and risks damaging your pump through cavitation, as well as subjecting it to extra wear and tear. I never use a hop spider and have had no blockages after over 40 brews in my BZ G.4. Running the pump during the boil will draw hop...
The biggest advantage is that a keg cleaner uses much less water and oxy soluntion - mine needs 7 litres: it would be less if I changed to a smaller bucket.
It makes sense to modify as per the instruction manual. I did this and after over 40 brews I have never had a pump blockage (I always use pellet hops).