You’re braver than me. My iMac has a “broken neck”, as I understand it, one of the two spring clips that allow the iMac screen to be tilted has broken 
This cause the monitor to lean all the way forward all of the time.
To fix this I’d have to completely disassemble the iMac removing everything inside to get to the broken plastic clip and replace it with a custom made metal clip. One weekend I stated to do this when I realized the newer iMac does not have a magnetically attached front glass, but rather it’s held on with double sided foam tape. Taking this apart would also require cleaning off all of the old tape and replacing it before I could put the glass back together.
So I cheated and cut a couple foam blocks to sit under the monitor (on the base stand) to hold the screen up. So, I guess there is life after a “broken neck” as I’ve been running this was for months and it general it works really well.
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The new iMacs are easier to service than the old ones. A few less parts inside, quite a few less screws.
The Tape is two pieces of VHB (Very High Bond) tape with foam between them. There is a neat tool to cut the foam, you can then remove the adhesive from the panel and the Housing. I’m sure there are methods to do it without the proper tools, just don’t damage the black mylar on the glass, you will wind up with a visual cosmetic defect.
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ooh, speaking of this topic, i sold the bad board on ebay for a decent amount and just yesterday put the old CPU up for sale…holy crap. less than 15 sec after I posted it I had four offers and about 10 seconds later a fifth one came in. All were decently over the “average” suggested price ebay had told me. So I made maybe 1/4 of my upgrade cost back via selling the old parts. 
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For the updating('cause why not): Still going strong with the new hardware. Still planning on doing the RAM upgrade at some point but it’s an(increasing cost) $300 now. These miners need to stop hogging up the RAM out there. It started out a year ago at about $240. I’ll have to start up a new thread soon. I picked up a cheap T5600 and wanna have an adventure with it…
In the mean time:
Sometime in Late Feb, I grabbed a fairly cheap 2011 mac mini i7 2.7. Turns out I gambled poorly on that one. It slowly died over the next 5 months. Sent it out for repair and abruptly died 3 months after that. Think a capacitor is shot. I can hear it whining when power hits it. So it’s up on ebay now as parts. Already have a 130$ bid for it so I’ll at least be making my repair cost back and the RAM will go up for sale next. 8Gb (2x 4Gb) DDR3 1333 PC-10600 by Crucial.
Welp, that’s been my electronics adventure over this past year. 
I put one of these in my imac as well as my macbook and they work great. Not SSD but still much faster than a standard HD. Boots in about a tenth of the time.
It’s not the RAM it’s the GPUs (or more specifically the gaming video cards) that mining uses (and now that’s only the altcoins, bitcoin is all about ASICs now). Even my trading bots don’t require huge machines - I run those off the small stick PCs. I expect the RAM issue is normal seasonality as all the PC manufacturers build for the holiday gift giving craziness.
Could be, and yes most of it is GPUs but RAM is getting bought somewhere as I’ve watched the prices go up for a few years now.
I expect that’s because everything is becoming a RAM hog now. Even cheap $500 laptops have 12GB 
Phones are starting to standardize on 64 for low end and 128 for higher end models. Smart connected stuff has RAM, toys have RAM, everything is getting connected and often require RAM. 
I’d sound like my father if I made a comment about remembering when 2GB was huge but that was only 10 years ago 
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Just swapped out 2 of the 4Gb RAM modules for 8Gb ones. Take that Apple. Now running 24Gb 1333 RAM in a 16Gb max 1066 specced 9 year old imac. 
When I pick up some more cash I’ll hit the other two. Got them for $110 total from Amazon. Seems to be much smoother as just having all my browser tabs open was 10Gbs. Gotta have my comics, my research tabs for podcasts, my research on audio editing, all my GF tabs(app, store, catalog, main account, forums, both matrix), various material sites, etc, etc.
Now maybe Logic Pro X will stop complaining so much about extra things running.