Your English is much better than some people who have lived here their whole lives.I know i have lot of mistakes in Gramma but i think i can comunicate that i want to! Thanks to encourage me !!!
(My wife is European, she has only spoken English for 6 years. I know how hard it can be since we have SO many words to mean the same thing! We do have over 1.1 million words in our dictionary after all!)
Regarding the electronic sound - is it a "Humming" sound, or a buzzing sound? My v2 beta did not have this sound. but my v2 noir does have this sound (but very quiet, only with my ear to the oven do I hear it). If I recall, this is caused by the oven heater. This should not affect the performance of the Indica (but i do not know for sure).