Gents,

When you manage the glow engine the way we (for me nearly) did 50 years ago you will not experience much problems, adjusting the needle valve “nose up” and you normally have a rich fuel/air ratio during horizontal flight.
Pattern flyers in the past even did mount restrictions in the carb to have more sucking pressure. Result was less difference of mixture vertical and horizontal so less variation in speed and less fuel consumption (but also less power!).
More complex it became with exhaust pressurized tank systems, two needle carbs, tuned pipes, diffuser cooling, regulators and pumps, all to give us more power or speed with the same engine.
I do still have two in flight adjustable Webra Dynamix carburetors of the past, With these we even could readjust the mixture ratio during flight.
When using pumps and pressure controllers we can peak the engine horizontal but we need more information and control of the thermal balance of the engine. For that I use data logging, not only temperature but also airspeed and rpm data logging. I think there are too much variables to find an optimum without these gadgets.
A second, more special reason for me is, I do use airspeed control, so the throttle servo is activated by the airspeed controller. I never detect discrepancies in throttle setting and lack of RPM output as result of too hot engine. The engine will die without I notice and so the Dynamix is no solution for me.
It is all our own wish to make modeling more complicate, so no “Sense and simplicity”.

Cees.