Motors for MK Star series

Preparing for the next meeting on 24th September, MK Star series, 15 and 06 are under construction, interchangeable 6 motors are so modified to apply rubber mounting method.
Rubber material applied in motor mounting spaces are indispensable buffer to prevent vibration caused by combustion, so to speak knocking vibration.
This method extends lives of servo potentiometer inside. Otherwise the vibration would be propagated everywhere to the body, especially the main wing would play a part of some speaker vibrating plates resulting to noisy flight.
OS 25 FP, Thunder Tiger 25 and ancient Maccoy 19 are for 15 and OS 10 FSR, OS 11 CZ and ENYA 09 are for 06 promptly. Maccoy 19 wears ENYA carburetor and one-off muffler adaptor for OS 702 muffler.
I must make haste to be on time at D-Day. Outfitting of servos and linkages takes time for 2 model airplanes contrary to my early expectation.
I made a way off the road by making balsa cutting for new "Tauri"  as my habitual escape behaviors. Natural and innate bad trend of myself does not change from my childhood after living over a half century.

YS 45 FR motor in unstable and stopping in the second half of the maneuver pattern shows that the time is come to extend the Tuned Pipe backward.
Thank to a precious advice by Mr. Yasufumi Sugawara who had been a chief staff of Ogawa Precision Mfg. Co. , the countermeasure could be imagined immediately.
Remembering my past, he gave me tremendous advises, they were not mealy thought opinions but were all scientifically proved truth and fact from a standing point of view as a manufacturer, based on actual trial and experiments.
But now it is impossible to hear from him anything, because he had gone away  high up to the sky a few years ago, leaving me much gorgeous memories.