My original HP-25, ailing

[BobVA]

If you decide to repair it, also take a look at Panamatik's Woodstock "LP" kit. The convenience of a 25 that runs for months from lithium AA's (at least in my use case) and has continuous memory makes it a very practical daily driver. And the clock is pretty cool!
The LP kit will also revive a 25 that is suffering from more faults than a New ACT replacement can fix.

25LP vs a DM42? Touch choice! I believe the forum wisdom in such cases is "buy both" :-)

Keep us posted!