when i engage the switch, it makes some weird pop and makes this weird oscillating sound then works normally. it only seems to do this on first use when plugged in or with battery. i am pretty sure the connections on the inside are soldered in the wrong places on the the input, output, 9v and switch. can someone please upload detailed images of a correct v2 wiring job? it would be much appreciated. also i am about to upload pictures of my wiring and maybe someone can help me

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