2015's calculator anniversary - the SR-52

[John Garza (3665)]

Maybe if you tell me where to get off-the-shelf replacements for the drive rollers on the 52, I'll agree with that last statement.

HP mechanicals are more involved, but that's trivial time compared to fashioning a roller by hand. And O-rings and model airplane tubing are readily available to make replacement rollers for the HPs.

-J