What a timely discussion. At age 72, I too just finished working on my HT-37 doing the break-in keying modification. When I brought it to the bench, I really struggled. Just flipping it over on the bench a half dozen times while working on it was difficult. When it came time to return it to its operating position, I swallowed my pride and called my wife for help. We lifted it together to bring it back to the desk.
Alan, W9CG