Although its a very good point about not being able to monitor the turbine for a wet start, we normally extend the ECU Data Terminal Lead to the front of the model (CARF Ultra Flash been a good example) and then just plug in for every start and monitor the temperatures through the start sequence, its sounds like its really just down to personal preference and although I have no evidence of Top Speed increasing with the bypass fitted, a friend with a Jets Munt Merlin 160 fitted in his Flash noticed a huge difference in Top Speed when he re installed the bypass system aswell as noticing how much more sky the model took to slow down due to the increased air flow efficiency. Just my opinion, but as I said, this was also on an overpowered sleek sport jet airframe, so the differences may be more pronounced on this type of airframe.

Kind Regards

Jame