Thanks,

jumping gauge needle:
I'll check the gauge terminals for corrosion, need to pull the instrument panel anyhow soon because my odometer quit (total miles and . I'll need new plastic gears it seems.
I just don't know the size of the second or third plastic gear.

temperatures between 90 and 100:
If the temperatures between 90 and 100 are acceptable and okay..... I need to confirm these temps by measurements . I have the new laser light thermometer and will test the temperatures at the thermostat housing soon.

aux fan starting at 95 C:
With the 105/110C switch the aux fan should not start before temperatures reach 105C correct? However my fan is starting before the needle is reaching the 100C mark, probably at 95. This would mean that the fan switch is probably questionable.

Martin