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That looks really good. If you want to make a quick $20 I'd pay to ship my lid both ways. Just reach out. If not. Perhaps provide the template and tell me what I need to purchase. Bit size, scratch awl, etc.
It appears the Chinese haven't worked out that extruded fin heatsinks don't work when placed horizontally and particularly, when placed in a sealed box with no airflow. There's no hope for these absolute idiots.
Anyone who buys this garbage deserves exactly what they get.
Well, we're solving that. It isn't garbage though... Drilling a set of holes isn' t that hard really. For some of us impossible... But thankfully there are a scant few who can help. Even if you have to do it yourself. My A07 is doing quite well. Powered well, cooled even better. Follow our lead and modify this desktop beast.
My experience with Op amp rollings with A07 has been noticeably different, if the speakers used are of high resolution. (McIntosh XRT18 in my case.) The three chips tested were 5532, muses8920 and opa1656. 1656 being the one to my liking. 8920 second yet may be preferred by different user. Muses01 is my favorite but not tested for not risking bent legs.