Nevets,
Realize that the original points were made of tungsten to handle the flash created by the increased voltage as a result of the pump coil's influence and voltage was raised from the original 12 volts to more then 200 volts. This high voltage proved have some benefit as it was sufficient to clean points oxidation that would form when the pump remained inactive over a period (i.e. winter storage, etc.).
As Bob previously mentioned, a long while back, Dave DuBois offered a schematic and directions for installing a power transistor to lower voltage and extend points life. However, as one who followed Dave's direction, this proved to succeed in lowering operational voltage across the points but now, with the lower voltage, the tungsten point oxidation was no longer burned off and pump maintenance or pump failures increased as a result of oxidation on points.
In 2011, I was introduced to the TSV diode during a discussion on this forum. This diode, differing from the many approaches implemented by Lucas, would allow up to a specific voltage and gate to ground any voltage over the selected maximum. Since the TSV is manufactured at a broad range of specifications, I selected a TSV with an upper limit of 23 volts (close to my 20 volt target I believed would be sufficient to de-oxidize the points). For the past 3 years since implementation, I have inspected the points each year without finding any reason for any maintenance or re-adjustments. I plan to do the same points examination next spring, after a short run to clean the points, and if I find all well as I expect, that will be my last scheduled inspection.
I see and expect the TSV installation to eliminate routine points maintenance and, so far, have been proven correct. If you do select a points pump, I suggest you install the $0.10 addition and don't expect you will need to be concerned further.
All the best,
Ray (64BJ8P1)