First bedding steps

Remove keyslep, fallboard, and cheekblocks. Remove action and treat verdigris in samples, pre-file sample hammers, remove sample frontrail punchings, and make sure sample hammers are off cushions. Remove action return spring and shim outer dogs to position action so cheekblocks fall into place when pushed in all the way. Bed cheekblocks. Back up glidebolts off keybed and assess backrail and frontrail fit.
grandwork.tools/

[@Hammondbrass]

I just completed a regulation with your protocols on an Estonia 274 from 1995 a few weeks ago. It has a wide roller bearing on the action spring that touches the key frame for less friction. I thought it was a nice touch.
It also had the most unusual glide bolts that I had never seen before. The glide bolts don’t recess inside the key frame. They are hexagonal like a bolt and about 6mm thick making the whole keyboard sit up pretty high. Subsequently, the damper underlevers also sit very high. Too high for my Spurlock damper jig.

[@chrisbrownrpt]

Thanks for your comment. The many manufacturer variations of action design solutions make this work particularly interesting for me. Tools like the Spurlock damper regulating jig, a tool I enjoy the benefits of, reflect choices made for practical reasons. We can shim the tool higher as needed. I have placed one Spurlock jig on top of another to fine tune the line of sprung sostenuto tabs once the key lift was in place. Worked really well...