I personally like the strain gauge as a leveling mechanism, particularly since I added a magnetic build plate. I like the idea of #2, I wonder if you could use a M10 male to make adapter like this: https://www.ebay.com/itm/404101432925?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=404101432925&targetid=1529314447630&device=m&mktype=pla&googleloc=1014257&poi=&campaignid=20398926916&mkgroupid=148892907822&rlsatarget=pla-1529314447630&abcId=9317285&merchantid=759262499&gclid=CjwKCAjwvrOpBhBdEiwAR58-3GcDoYiTk2pI6UQYjkseFyjCi99dch8PZQjWqWdVfneK6-DX-6hiiRoCuc0QAvD_BwE
And just connect your adapter plate to the hotend (or tap the orbiter? Idk)
You might need a little printed spacer and a short Bowden tube inside that.
Other little nice things/learnings for the printer I have done other than the spring steel sheet:
If you want an all metal hotend you can replace the heartbreak with a slice engineering copperhead heartbreak (use a G2 type)
If you want color change capabilities, to have finer z adjust, and to have a larger mesh, i recommend trying the following custom firmware (IF YOU ARE CONFIDENT WITH THIS KIND OF STUFF)
Yeah mobi support got removed earlier this year. Epubs work fine for me though once use calibre to remove the DRM.